The American flag flies at half-staff at the White House in Washington, Thursday, May 12, 2022. (AP Photo/Susan Walsh)The American flag flies at half-staff at the White House in Washington, Thursday, May 12, 2022. (AP Photo/Susan Walsh)President Joe Biden speaks during a visit to O'Connor Farms, Wednesday, May 11, 2022, in Kankakee, Ill. Biden visited the farm to discuss food supply and prices as a result of Putin's invasion of Ukraine. (AP Photo/Andrew Harnik)FILE - White House COVID-19 Response Coordinator Dr. Ashish Jha speaks during the daily briefing at the White House in Washington, April 26, 2022. Speaking to the Associated Press, Jha said Americans' immune protection from the virus is waning and the virus is adapting to be more contagious, and that booster doses for most people will be necessary with the potential for enhanced protection from a new generation of shots. (AP Photo/Susan Walsh, file)AP's Zeke Miller interviews White House COVID-19 Response Coordinator Dr. Ashish Jha, Thursday, May 12, 2022 on the White House complex in Washington. Speaking to the Associated Press, Jha said Americans' immune protection from the virus is waning and the virus is adapting to be more contagious, and that booster doses for most people will be necessary with the potential for enhanced protection from a new generation of shots. (AP Photo/Nathan Elgren)
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The American flag flies at half-staff at the White House in Washington, Thursday, May 12, 2022. (AP Photo/Susan Walsh)
