Doctors in england say theyve discovered the first drug that dramatically reduces deaths in covid19 patients, and it turns out its already on the market. Reses inges a lowcost steroided trial, it cut deaths among the ird. Est coronavirus patients by a third. Tonight, doctors are cautiously optimistic that if the research pans out, the drug could eventually help save hundreds of thousands of lives. The new study comes as nearly half of the states in the u. S. Are struggling with spikes in cases, including in florida, where tonight, the state has its highest number of new infections since the pandemic began. Oklahoma, texas, and arizona are also reporting record highs in new cases today. And as we come on the air tonight, more than 116,000 people have been killed by the virus in the u. S. , and there are more than 2. 2 million confirmed cases nationwide. Tonight, theres also new research that says Wearing Masks could prevent hundreds of thousands of infections by stopping the spread of virus droplets in the air. So theres a lot of news to get to tonight, and our team of correspondents is standing by. Cbs Manuel Bojorquez is going to lead off our coverage tonight from miami. Good evening, manny. Reporter good evening, norah. Idhas set yet another daily record. More than 2,700 new coronavirus cases were reported today. Hospin veral states, so word of a medical advancement could not come soon enough. Its being called a medical breakthrough in the fight against the coronavirus. The Worlds Largest trial of existing treatments found a cheap, decadesold anti inflammatory steroid called dexamethasone reduced deaths by 20 in covid19 patients on oxygen. What we saw was really quite remarkable. In ventilated patients with covid19, the drug dexamethasone, so ten days of treatment with that, which is a tablet or an injection, reduces the risk of death by about 35 . Reporter dr. Scott krakower was not par reporter dr. Scott krakower was not part of the trial, but received dexamethasone in april when he battled the virus himself in new york city. So, is this a game changer . I think it is a game changer. I mean, it was the first time in, like, i felt like almost a month, i stopped coughing for, like, an hour. It was such i dont know, to me a blindblowing moment. Reporter cbs news chief medical correspondent dr. Jon lapook. There s a statistically significant decrea significant decrease in mortality with dexamethasone is very encouraging. Reporter news t white house now projects 200,000 covidrelated deaths in the u. S. By october. 19 states are reporting reporting increases in average increases in average daily new cases, compared to two weeks ago. Today, texas saw a record jump of more than 2,600. Florida has reported nearly 15,000 new cases over the last ten days. But today, in a wall street journal oped, Vice President possib second wave overblown rts says he will not close the state. To suppress a lot of working age people at this point i dont think would likely be very effective. Reporter still, miamis mayor put the next phase of reopening on hold due to recent spikes. Austins mayor extemded a stay athome order. And nevadas governor said the state was not ready to enter phase three. Retail sales jumped nearly 18 there was encouraging news today about the economy. Retail sales jumped nearly 18 last morning a record, as more business and restaurants reopened. Odonnell manuelher that bojorquez, thank you. Toni comes at the expense of social g morecing. About Garrett Rolfe rard brooks ndys tonight, were learning more irout Garrett Rolfe, the Atlanta Police officer who killed Rayshard Brooks in a wendys parking lot. The 27yearold officer was reprimanded three years ago in another useofforce case involving a firearm. Today, President Trump called on mounting to address Excessive Force by police departments, President Trump took the unusual step of surrounding himself with Police Officers today as he signed an executive order suggesting new standards for law enforcement. These standards will be as high and as strong as there isrs executive order creates a database to track officers with Excessive Force complaints, suggests banning chokeholds in most cases and calls on departments to deploy social workers when responding to the homeless and mentally ill. But the order is merely a list of recommendations, not legal restrictions. And the president used his speech today less as a conversation about racial biasiy supporting officers. Without police, there is chaos. Without law, there is anarchy, and without safety there is catastrophe. Reporter democrats say the president s action is not enough and want a ban on all chokeholds and to make it easier to sue police for misconduct. There is nothing about what the president announced today that would hold Police Officers who break the rules and break the law accountable. Order, President Trump met with the families of both amjean, atatiana jefferson, and others impacted by police violence, as well as the mother of ahmaud arbery, the 25yearold black man killed in georgia while jogging. Three white men are charged with his murder. Wanda cooper jones is arberys mother. I think the president was very receiving. He was very compassionate. He did assure each Family Member that we would and should expect change. Reporter meanwhile tonight, a new twist in the president s rift with his former National Security adviser john bolton. The Justice Department is suing him to block publication of his tellall book scheduled to be released next week. The ai classified informion. With john bolton ahlclsifi. Now, the Justice Department is saying that the National Security council has not yet finished its review of the book. This book is expected to be highly critical of President Trump. Norah. Odonnell ben tracy at the white house, thank you. Tonight, an active Duty Air Force sergeant, already jailed in the ambush killing of a sheriffs deputy in california, is facing new charges of murdering a federal officer. Prosecutors say hes part of a violent antigovernment extremist group. Heres cbs jeff pegues. No justice, no peace reporter on may 29, investigators believe this oakland protest over George Floyds death was used as a cover for an operation to kill. Air force Sergeant Steve carrillo, and an accomplice, rort juswere hunred down inside this white van. They would go on to shoot and kill protective Services OfficerDavid Patrick underwood and injuring his partner. Shots were fired out of that sliding side passenger door. Reporter carrillo would allegedly go on to murder a sheriffs deputy before he was taken into custody. His van and a message in his own blood on the hood of a car suggest that he was part of a radical movement. The complaint alleges that the patch and the phrases written by carrillo are associated with the socalled boogaloo movement. Reporter the boogaloos, some sharing posts under a hashtag, are loosely affiliated extremists. Some of them believe in sparking a civil war. Others are White Supremacists opportunity for boogaloo to try. Reporter in atlanta, police are looking for the arsonist who, during a peaceful protest, set fire to the wendys, which was the scene of the Police Shooting of Rayshard Brooks. Redc headquarters right across street there in atlanta. Investigators say in that arsonist case, arsonists used homemade torches, lighters, and aerosol cans, among other things, to spark the flames. And were told that some of the protesters even tried to block firefighters from making it to the scene to put out the flames. Norah odonnell jeff pegues, thank you. Pacific gas and electric pleaded guilty to Involuntary Manslaughter today for causing the deaths of 84 people in a wildfire that tore through the town of paradise, california, in 2018. Their c. E. O. , bill johnson said, guilty, your honor, 84 times once for each victim. The company admitted its equipment started the fire and will pay more than 25 billion in fines and settlements. Tonight, china is racing to contain a new outbreak of covid19. After reporting no new infections in beijing for more than 50 days, the virus has returned. Heres cbs ramy inocencio. Reporter tonight, parts of beijing under lockdown again. Officials there calling is war time mode. Schools closed, transport in and out of the city shut down. There are now more than 100 coronavirus cases linked tos xie market. Health officials scrambling to quickly contract trace, an estimated 2,000 people from market workers to recent visitors. Near the area, scenes of hundreds of military Police Deployed to freeze the flow of barr a nowurroung shuttered market stalls as officis e in a complex the size of 250 football fields. Chinese Officials Say one focus has been on imported salmon, specifically packaging, after a chopping board tested positive for a european strain of the virus. We need to look at what has happened in this case. I dont believe its the primary hypothesis, but it needs to be explored. Reporter and a second surge is also the fear here in japans capital, too. Tokyo reported more than 20 new coronavirus cases every single day for nearly the past week. Norah. Odonnell ramy inocencio, a new udy nds parf the u. S. Where face masks are mandatory, as many as 450,000 cases of coronav m been prevented. That as new Research Shows improving ventilation significantly lowers how long the virus stays in the air. Heres cbs dr. Jon lapook. Reporter tonight, a major tool in the fight against coronavirus could be right inside our homes. Experts say crack a window, open a door. Thats because the virus can float indoors. When we cough or sneeze, droplets containing virus can travel, larger ones usually up about six feet, but smaller ones, particles called aerosols, can float invisibly through an entire room and can be produced through normal speech. The zinger for this virus is that basically the aerosols become airborne and potentially infectious for hours. Reporter Kimberly Prather has spent her career studying aerosols. If it gets in a room and everybody breathes that air it opens up the number of people who can be infected. Reporter aerosols, as shown here, can help explain events like a choir practice in Washington State in march where one person likely infected 52 others. Were not recognizing the potential for airborne. Reporter joe allen is the director of harvards Healthy Buildings program. Opening up the windows is easy and cheap, but what about actually changing thesya big building . Out andevamp their entire mechanical system. Bring in a bit more outdoor air, which most Building Systems can do. And if youre recirculating air you need to improve or put in highefficiency filters. Every building can be a healthy building. It doesnt cost that much to get us there. Reporter new Research Suggests sunlight can deactivate the virus and aerosols, and wearing a mask provides another crucial layer of protection against the airborne spread of the virus. Norah. Odonnell dr. Jon lapook thank you. Tensions are high after north korea demolished a building used to host talks with south korea, and tonight the regime is threatening military action. Cbs Margaret Brennan reports. Reporter the statement from north korea was not subtle blowing up the office for diplomacy in kaesong that had opened in 2018 with south korea and making a good on a threat by kim yojong, kim jonguns increasingly powerful sistearo took a symbolic step into north korea last year to shake hands with kim jongun. Thank you, everybody. Reporter but diplomacy has stalled. The regime continues to test shortrange missiles and has produced enough nuclear for dozens of weapons. North korea said todays action was provoked by south korean activists who had sent antiki leaflets across the border. The Trump Administration called the actions counterproductive, careful language meant to keep alive President Trumps signature Foreign Policy initiative. North korea often ratchets up tension in election years in the hope of extracting concessions. Former c. I. A. Analyst jung pak i think we are in for a potentially a wild ride in june as north korea and the kim family tries to show strength for both internal and external audiences. Reporter Margaret Brennan, cbs news, washington. Odonnell and there is still much more news ahead tonight on the cbs evening news. Going, going, gone can veand lahyinlibraries are carrying a lot more than books these days. Come on christian, step onto the blue line. Good stay safe, man. This device is giving us an Accurate Temperature check. Youre good to go. Have a good day. The safety of Amazon Community is very important. Youre good to go, sir. Thank you if i can take care of everyone who is sick out there, i would do it in a heartbeat. Step onto the blue line, sir. I have to take care of my coworkers. Thats how i am. This is my passion. Have a good day. I have a son who is 10 years old. I say, you know, mommy loves to help people. And he said, wow, one day im gonna be like you too. Im gonna be a doctor. 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Heres cbs carter evans. Reporter its americas time for baseball to return, especially with other sports wkr rob manfred sounded confident. The percent chance were playing Major League Baseball this year . 100 . Reporter last night, that sunny optimism disappeared. Im not confident. Its just a disaster for our game. Reporter its a fallout between the union and owners over how the season can get salvaged and how much players will get paid per game. But now, ballparks across the country, including dodger stadium, sit empty. The dodgers were supposed to host the Arizona Diamondbacks tonight. Now their parking lot has become one of californias largest covid testing sites. And theres the harsh reality, reports that some players and coaches have tested positive. As for the athletes, a simple message players want to play, the same from allstars bryce harper and mike trout tell us when but thats only if after all the talking the owners and players dont strike out. 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