Here are a few things to know about the day’s news from The Associated Press. Hours after a declaration by President Donald Trump to send out the military and “dominate the streets,” American cities were engulfed in more violence and destruction that overshadowed peaceful protests for George Floyd. World Health Organization officials privately expressed frustration over not getting the information they needed from China to fight the spread of the deadly coronavirus, the AP finds. Joe Biden is hoping to seize the delegates needed to formally clinch the Democrats’ presidential nomination as seven states and the District of Columbia vote. 

The global race for a COVID-19 vaccine boils down to some critical questions about how much to rev up people's immune systems — and whether revving it the wrong way could cause harm. Even as huge studies in people are poised to start, behind the scenes scientists are still testing ferrets, monkeys and other animals, seeking clues to those basic questions. The first animal studies trickling out show no sign of a side effect that has worried researchers. But it's still not clear exactly how much of an immune reaction possible vaccines need to spark for real protection.

Amid protests seeking justice for a black man killed after a white police officer pressed his knee into his neck, several people have lost their lives. They include a well-known and popular owner of a barbecue spot in Louisville, Kentucky and a federal officer working security at a courthouse in Oakland. Many of these deaths have gone. unnoticed, overshadowed by the turmoil roiling American cities.

Authorities say an officer has been shot in Las Vegas and police are responding to another shooting as people protest the killing of George Floyd in Minneapolis. The Las Vegas Metropolitan Police Department says the officer was shot in the area of the Las Vegas Strip and an officer was involved in a shooting in the downtown area. The department said both shootings were on Las Vegas Boulevard. Protesters have been rallying for days across the country over the death of George Floyd, who was seen on video pleading that he couldn’t breathe with a white police officer pressing his knee into his neck for several minutes before he stopped moving.

LAS VEGAS (AP) — Las Vegas authorities: Officer shot, police respond to separate shooting amid George Floyd protests.

The Latest on the death in Minneapolis of George Floyd, a handcuffed black man who pleaded for air as a white police officer pressed a knee on his neck:

The Latest on the coronavirus pandemic. COVID-19 causes mild or moderate symptoms for most people. For some, especially older adults and people with existing health problems, it can cause more severe illness or death.

Will temperature checks of employees make workplaces safe? No, not completely. They can help reduce the risk of COVID-19 infections but shouldn’t be the only safety measure employers take. Some employers are following White House guidelines to screen workers for fever with daily temperature checks to help prevent the spread of infections. But screening for fevers alone won’t eliminate risk. People with the virus can be contagious without a fever, so it’s still important for employers to increase space between workers, disinfect surfaces and encourage hand washing.

Maryland residents are returning mail-in ballots for the state’s primary, and the highest-profile race Tuesday is the Democratic contest to be the nominee for Baltimore’s mayor. The winner of that race in Maryland’s largest city will likely become mayor. Democrats outnumber Republicans 10-1 in Baltimore, making November’s general election mostly a formality. Baltimore voters are looking for someone who can rein in violent crime, address entrenched poverty and restore steadily eroding trust in local government. More than 20 Democrats are seeking that challenge. The election across the state is being conducted mostly by mail because of the coronavirus pandemic.

When Andrés Manuel López Obrador won Mexico’s presidency after years of agitating for change, many expected a transformative leader who would take the country to the left even as much of Latin America moved right.  Instead, López Obrador is leading like a conservative in many ways _ cutting social spending, investing heavily in fossil fuel development and helping the U.S. crack down on the northbound flow of migrants. As coronavirus spreads through Mexico, the president known as AMLO has rejected widespread shutdowns and pressed to keep the economy going. He’s used the pandemic to justify weakening environmental protections, and pushed for oil-centered infrastructure projects.

After the new coronavirus was first detected in China, scientists rushed to identify it. The World Health Organization publicly praised China’s transparency, thanking them for “immediately” sharing the virus sequence with the world. But in fact, Chinese officials sat on releasing the genome for over a week. Although WHO continued to commend China, recordings of internal meetings throughout January show they were concerned China was not sharing enough information to assess the risk posed by the new virus, costing the world valuable time.  

Throughout January, the World Health Organization publicly praised China for what it called a speedy response to the new coronavirus. It repeatedly thanked the Chinese government for sharing the genetic map of the virus “immediately” and said its work and commitment to transparency were “very impressive, and beyond words.” But behind the scenes, there were significant delays by China and considerable frustration among WHO officials over the lack of outbreak data, The Associated Press has found. China sat on releasing the genetic sequence for more than a week and stalled on sharing critical epidemic details with WHO throughout January.

Iowa primary voters are deciding Tuesday whether Republicans will stick with conservative lightning rod Steve King in the state's conservative northwest after a series of setbacks for the congressman known for incendiary remarks about immigrants and white supremacy. Stripped of his committee assignments and national Republican campaign backing, King faces five challengers including one backed by the GOP establishment. Meanwhile, Des Moines businesswoman Theresa Greenfield soaking up attention and money in the four way Democratic primary to challenge Republican Sen. Joni Ernst, whose approval has slipped in the last year.  

Is President Donald Trump a thug, a modern-day dictator? Or a heroic defender of the constitution? It depends where you watch television. The cable news networks CNN, Fox News Channel and MSNBC have risen to the top of the television ratings by probing America's divisions every night. With unrest in the streets and the nation's mood rubbed raw, there's no reason to think the prime-time anchors would change their tune. Following the president's law-and-order speech and walk to nearby church through streets forcibly cleared of protesters, the rhetoric was only hotter on Monday.

NEW YORK (AP) — Arrests made inside iconic Macy's store in Manhattan amid violence following George Floyd protests.

A vehicle plowed through a group of law enforcement officers at a George Floyd demonstration Monday night in Buffalo, injuring at least two. Video from the scene shows the vehicle accelerating through an intersection shortly after officers apparently tackle a protester on the street and handcuff him. Officers are seen scattering to avoid the SUV as it drives off on Buffalo’s east side. Apparent gunshots are heard. The officers were taken to Erie County Medical Center. Authorities said they were in stable condition. 

BUFFALO, N.Y. (AP) — Video shows SUV plowing into officers at Floyd protest in Buffalo, New York, running over at least 1, then speeding away.

The bishop of the Episcopal Diocese of Washington is sharply criticizing President Donald Trump for staging a visit to the historic St. John’s Church across from the White House. During Trump's visit Monday night, he held up a Bible after authorities had cleared out peaceful protesters. The diocese of the Rev. Mariann Budde includes St. John’s, and Budde said she was “outraged" by the moment and noted that Trump didn’t pray during his visit. 

A federal judge has upheld Arkansas’ execution process, rejecting death row inmates’ claims that the use of a sedative amounts to cruel and unusual punishment. U.S. District Judge Kristine Baker on Monday ruled the state’s use of midazolam in lethal injections as constitutional and dismissed claims that less painful methods of execution are available. Attorneys for the inmates have said those alternatives include a firing squad and a barbiturate commonly used in physician assisted suicide. Arkansas doesn’t have any executions scheduled, and its supply of lethal injection drugs has expired.

Some Democratic governors are resisting President Donald Trump’s threat to deploy the U.S. military unless they dispatch National Guard units to “dominate the streets” in reaction to the violence that has gripped the country. Illinois Gov. J.B. Pritzker says he doesn't believe the federal government can send military troops into his state. He accuses Trump of creating an “incendiary moment" by threatening to do so. Demonstrations against the killing of George Floyd in Minneapolis while in police custody have turned violent across the country, with people breaking into businesses and stealing, smashing car windows and setting buildings on fire.

A third lawsuit has been filed involving the deaths of patients over wrongful insulin injections at a West Virginia veterans hospital. Charleston attorney Tony O’Dell filed the federal lawsuit Monday in the death of John William Hallman. The 87-year-old Navy veteran died at the Louis A. Johnson VA Medical Center in Clarksburg in 2018. The lawsuit was filed on behalf of Hallman’s son and daughter. It seeks unspecified damages. Two other lawsuits have been filed on behalf of the families of other patients who died at the hospital in 2018. 

As thousands of protesters take to the street in response to police killings of black people, companies are wading into the national conversation but taking care to get their messaging right. Netflix’s normally lighthearted Twitter account took on a more somber tone on Saturday: “To be silent is to be complicit. Black lives matter. We have a platform, and we have a duty to our Black members, employees, creators and talent to speak up.” That got retweeted over 216,000 times and “liked” over a million times. The streaming service is just one of many corporate brands that have turned to social media to voice their concerns over racial injustice.

An Illinois man who allegedly said he was traveling to Minneapolis to “riot” after the death of George Floyd has been charged with federal counts. Twenty-eight-year-old Matthew Lee Rupert of Galesville is charged with civil disorder, rioting and possession of unregistered destructive devices. An FBI affidavit says Rupert posted videos to his Facebook page last week that showed him in Minneapolis, handing out explosives to others. Floyd, a black man, died May 25 after a white Minneapolis police officer pressed his knee into Floyd’s neck, despite Floyd saying he couldn't breathe. The charges come as civic leaders nationwide have blamed outsiders for bringing trouble into their communities. 

A University of Miami professor blamed a controversial law enforcement informant for his career-ending decision to try and hide $3 million in proceeds from a corruption scheme run by a businessman connected to Venezuela’s socialist government. Bruce Bagley pleaded guilty Monday to two counts of money laundering. Bagley is an expert on crime in Latin America. But he ran into trouble after he started taking payments from a Colombian businessman tied to Nicolas Maduro's government in Venezuela. Two people told the AP that Bagley was introduced to the businessman by a longtime law enforcement informant he had known for years. 

Authorities say a man died after after being shot by U.S. Marshals as they tried to arrest him Monday in a northwest Arkansas parking lot on an attempted murder warrant. Fayetteville police spokesman Sgt. Anthony Murphy said the man was shot while in his car. The U.S. Marshals Service said the man died after being taken to a hospital. The shooting happened in the parking lot of strip mall. Murphy said no law enforcement officers were hurt. An investigation is ongoing.

Vandalism and unrest arising from protests over police brutality are moving into some neighborhoods and suburbs as city centers lock down. That's leaving communities that had felt insulated from early unrest more fearful and vulnerable. Vandals robbed malls and shopping centers in communities outside Chicago's downtown. They stormed stores across the San Francisco Bay in apparently coordinated smash-and-grabs. Banks and a sleek, modern office building were burned to the ground in a San Diego suburb. Many blame the mayhem on opportunists rather than those protesting police brutality in the killing of George Floyd by Minneapolis police.

Thousands of people from Los Angeles to New York have swept up glass from broken store windows, covered over graffiti and organized ransacked businesses after protests again turned destructive. Some showed up only hours after they participated in the demonstrations over police killings of black people, including George Floyd. Many said cleaning was cathartic. After marching and then trying to stop people from vandalizing businesses, one Los Angeles-area protester said helping vandalized businesses restored his faith in humanity. Countless businesses had taken a hit from coronavirus restrictions and were starting to reopen as the protests led to other expensive setbacks in damage and stolen merchandise.

A new analysis finds masks and social distancing help but hand washing and other measures are still needed to control the coronavirus. Single-layer cloth masks are less effective than surgical masks, while N95 masks provide the best protection. Social distancing works, and eye protection such as goggles or eyeglasses can help too. The researchers caution that none of the strategies work perfectly. The analysis was published Monday in the journal Lancet. The researchers combed through scientific studies involving the virus causing COVID-19 and other evidence on what worked to prevent infection during previous epidemics.

LOUISVILLE, Ky. (AP) — Louisville, Kentucky mayor fires police chief, says officers involved in fatal shooting failed to activate body cameras.

The message from protesters around the United States is that George Floyd is the latest addition to a grim roster of African Americans to be killed by police. In demonstration after demonstration, protesters are carrying the signs that include the names of other blacks whose lives ended violently in encounters with police. They point out that Floyd is part of a larger story about police brutality and racism and that his death is a reminder of the dangers facing African Americans from California to Florida and from New York to Texas.   

Two Brooklyn attorneys have been granted bail on federal charges in the firebombing of a New York City police vehicle amid demonstrations over the weekend triggered by the police killing of George Floyd in Minnesota. But U.S. Magistrate Judge Steven Gold on Monday ordered another woman detained in a separate firebombing that targeted four New York City police officers. Authorities described the attacks as among the most brazen the city saw during an eruption of violent demonstrations. The attorneys charged in the attacks were Colinford Mattis, a 32-year-old corporate attorney, and Urooj Rahman, 31 year-old human rights lawyer.

MINNEAPOLIS (AP) — Medical examiner lists Floyd's death a homicide, says heart stopped while police restrained him and compressed his neck.

As thousands of protesters take to the street in response to police killings of black people, companies are wading into the national conversation but taking care to get their messaging right. Netflix’s normally lighthearted Twitter account took on a more somber tone on Saturday: “To be silent is to be complicit. Black lives matter. We have a platform, and we have a duty to our Black members, employees, creators and talent to speak up.” That got retweeted over 216,000 times and “liked” over a million times. The streaming service is just one of many corporate brands that have turned to social media to voice their concerns over racial injustice.

A tropical depression has formed in the Gulf of Mexico and forecasters warn it could become a tropical storm during the night or on Tuesday as it threatens to dump heavy rains over southern Mexico and parts of Central America. The U.S. National Hurricane Center said the depression formed Monday afternoon about 50 miles west-southwest of Campeche, Mexico.  At 5 p.m. EDT, the storm had maximum sustained winds of 30 mph as it moved toward the west-northwest near 7 mph. The government of Mexico has issued a tropical storm warning from Campeche west to the port of Veracruz on that country’s Gulf coast. 

From actors Jamie Foxx and John Cusack to supermodel Emily Ratajkowski and “Insecure” star Kendrick Sampson, many celebrities decided to do more than just tweet about their outrage over the killings of black people at the hands of police. They took to the streets alongside thousands of protesters across the U.S. in the nation's most significant night of protests in a half-century.

George Floyd's brother says violence isn't going to bring his brother back. Terrence Floyd is asking for calm following widespread unrest that began after his sibling died while in police custody in Minneapolis. “ Chants of “What’s his name? George Floyd!” filled the air as a large crowd gathered in the spot where a police officer pressed his knee into George Floyd's neck for several minutes, including after Floyd stopped moving. Terrence Floyd urged protesters to ”do this another way." Then, wearing a face mask with George’s image on it, he kneeled silently, prompting many of the people around him to join him on the ground.

President Donald Trump is paying a visit Friday to a Maine manufacturer of specialized swabs used in testing for the coronavirus. The first word of the visit came during a discussion between Trump and governors on Monday following a weekend of demonstrations, some violent, following the death of George Floyd in Minneapolis. Maine Gov. Janet Mills criticized the governor for calling governors “weak” and urging them to “dominate” protesters by arresting and imprisoning them. She urged to “check his rhetoric at the door” when he visits on Friday.

The U.S. Census Bureau has reached its predicted goal for people answering the 2020 census questionnaire on their own. The bureau reported Monday that the self-response rate is 60.5%. That will likely grow higher in the next two months before the next phase of the 2020 head count begins in August. That’s when hundreds of thousands of census-takers start knocking on the doors of homes whose residents haven’t yet answered the census questions. The higher the self-response rate, the fewer door-knockers are needed and that saves the Census Bureau money. The 2020 census will determine how many congressional seats each state gets.

Four of the country’s biggest publishers have sued a digital library for copyright infringement. They allege that the Internet Archive has illegally offered more than a million scanned works to the public, including such favorites as Toni Morrison’s “Song of Solomon,” Malcolm Gladwell’s “Blink” and Cormac McCarthy’s “The Road.” In March, the Internet Archive announced it had established a “National Emergency Library” in response to the coronavirus outbreak that had shut down most of the country’s schools and libraries. The Archive has said that it operates like a traditional lending library, a non-profit entity providing free books.

NEW YORK (AP) — Mayor, governor of New York say nation's largest city is imposing 11 p.m. curfew after days of violence amid protests.

When violent protests over the death of George Floyd reached Los Angeles, people of color expressed heartbreak but not necessarily surprise. They had seen it nearly 30 years ago when riots rocked the city after four white police officers were acquitted of charges in the beating of black driver Rodney King. Some who lived through the 1992 riots hoped they'd never see something like them again. But they didn't expect video as violent as a white Minneapolis officer pressing a knee into Floyd’s neck for several minutes even after he stopped moving and pleading for air. Others say the strife shows that systemic racism still exists. 

MINNEAPOLIS (AP) — Attorney says family-commissioned autopsy shows George Floyd died of ‘asphyxia due to neck and back compression’.

The first astronauts launched by SpaceX have captured the flag left behind at the International Space Station nearly a decade ago by the last crew to launch from the U.S. NASA astronaut Doug Hurley showed off the flag Monday, a day after arriving at the orbiting outpost. The flag flew on the first space shuttle flight in 1981 and the last one in 2011. Hurley was on that final shuttle mission. The flag was an added incentive for SpaceX and Boeing, competing to be the first private company to launch astronauts into orbit from the U.S. Boeing  first astronaut flight isn’t expected until next year.

Facebook employees are using Twitter to register their frustration over CEO Mark Zuckerberg’s decision to leave up posts by President Donald Trump that suggested protesters in Minneapolis could be shot. While Twitter demoted and placed a warning on a tweet about the protests that read, in part, that “when the looting starts the shooting starts,” Facebook has let it stand, with Zuckerberg laying out his reasoning to do so in a Facebook post Friday. Trump’s comment evoked the civil-rights era by borrowing a phrase used in 1967 by Miami’s police chief to warn of an aggressive police response to unrest in black neighborhoods.

The superintendent of the U.S. Naval Academy says the school plans to have its students return to campus in the fall for the next school year after they finished the last semester with online learning due to the coronavirus. Vice Adm. Sean Buck said Monday other service academies expect to have students on their campuses in the fall. Buck told members of the Naval Academy's Board of Visitors that the service academies cannot develop leaders for the nation's military online. While academics can be done online, Buck says the other two pillars of the academy's mission statement are developing midshipmen morally and physically, and that requires hands-on experiences.

Gov. Andrew Cuomo says he is concerned that mass protests over George Floyd’s death in New York City could imperil the long, hard fight to contain the coronavirus pandemic in a worldwide hotspot. The Democratic governor said he agreed with demonstrators fighting racism and societal inequality. But he sounded frustrated about possibly compromising more than two months of social and economic sacrifices. New York City is set to begin phasing in economic activity June 8. Statewide hospitalization rates have been ticking down for weeks and the daily death toll has gone from almost 800 in early April to 54 on Sunday.  

Nearly three dozen black alumni of Liberty University are denouncing school President Jerry Falwell Jr., suggesting he step down after he mocked Virginia’s mask-wearing requirement by invoking the blackface scandal that engulfed the state’s governor last year.  In a letter to Falwell, shared with The Associated Press, faith leaders and former student-athletes told Falwell that his past comments “have repeatedly violated and misrepresented” Christian principles. They said they would stop urging students to attend Liberty, stop donating to the university, and would urge fellow people of faith to avoid speaking at the school unless Falwell changes his behavior or steps aside. 

Atlanta’s mayor says two police officers have been fired and three others placed on desk duty over excessive use of force during a weekend protest incident. Mayor Keisha Lance Bottoms said Sunday that she and the police chief made the decision after reviewing body-camera footage of a Saturday incident that first gained attention from video online and on local news. It shows police officers in riot gear and gas masks surrounding two college students in a car. The officers use stun guns on both the woman and the man.

Authorities say four men died when a small plane crashed into a southern Illinois farm field. The Federal Aviation Administration says the single-engine Piper PA28 crashed about 3:45 p.m. Sunday under unknown circumstances. The plane was destroyed upon impact. The crash occurred about 45 miles north of St. Louis, Missouri. Macoupin County Coroner Brad Targhetta says the crash killed the pilot, 35-year-old Joshua Daniel Sweers of Grand Blanc, Michigan, and three passengers: 37-year-old Daniel Shedd of  St. Charles, Missouri; 39-year-old Daniel Schlosser of Mount Morris, Michigan; and 39-year-old John Camilleri of Buffalo, New York. 

The foremost institution of higher learning for Conservative Judaism in the United States has named Shuly Rubin Schwartz to be the first woman leader in the seminary's 134-year history. The New York-based Jewish Theological Seminary says Schwartz will become its eighth chancellor July 1. Schwartz has been affiliated with the seminary for three decades, most recently in a two-year stint as provost. Previously she was dean of its undergraduate dual-degree program with Columbia University and Barnard College. As provost, Schwartz has been instrumental in guiding a transition to remote learning as in-person classes were canceled due to the coronavirus pandemic.