U.S. infectious disease expert Dr. Anthony Fauci informed the WHO on Thursday that the U.S. will not be leaving the organization. Fauci is seen here last month, receiving the Moderna coronavirus vaccine in Washington. Chia-Chi Charlie Chang/Anadolu Agency via Getty Images hide caption
Politics
President Biden, joined by Vice President Harris and Dr. Anthony Fauci, signs executive actions as part of his administration's COVID-19 response on Thursday. Mandel Ngan/AFP via Getty Images hide caption
President Biden sits in the Oval Office at the White House after being sworn in as the 46th president of the United States on Wednesday. Jim Watson/AFP via Getty Images hide caption
Nathan Grebil takes the temperature of a fourth-grader during a health screening in October at Bel Aire Elementary School in Tiburon, Calif. Lea Suzuki/San Francisco Chronicle via Getty Images hide caption
FBI Director Christopher Wray addresses a press conference at the Justice Department in October. Jim Watson/Pool/Getty Images hide caption
Migrants are greeted by Taylor Levy (center), a local immigration attorney, at the Paso del Norte International Bridge in April 2020 in Ciudad Juarez, Mexico. People seeking asylum were enrolled in the Migrant Protection Protocols program, better known as the "Remain in Mexico" policy. The Department of Homeland Security announced that starting Thursday, it would stop new enrollments in MPP. Paul Ratje/AFP via Getty Images hide caption
President-elect Joe Biden greets singer Lady Gaga during the inauguration. Susan Walsh/AP/Bloomberg via Getty Images hide caption
President Biden signs executive actions hours after his inauguration on Wednesday. He is expected to reverse several Trump-era policies. Evan Vucci/AP hide caption
Joe Biden gives his inaugural address on Wednesday. Caroline Amenabar/NPR hide caption
Poet Amanda Gorman speaks at the inauguration of U.S. President Biden on the West Front of the U.S. Capitol on Wednesday. Alex Wong/Getty Images hide caption
Katy Perry performs during the Celebrating America event on Wednesday, following the inauguration of Joe Biden as the 46th president of the United States. Biden Inaugural Committee/AP hide caption
Avril Haines, seen here during her confirmation hearing Tuesday, was confirmed by the Senate as director of national intelligence. Joe Raedle/Pool/AFP via Getty Images hide caption
President Biden and first lady Jill Biden hug Hunter Biden and daughter Ashley Biden after being sworn in as U.S. president. Tasos Katopodis/Getty Images hide caption
President Joe Biden signs three documents including an inauguration declaration, cabinet nominations and sub-cabinet nominations in the President's Room at the US Capitol after the inauguration ceremony, Wednesday. Jim Lo Scalzo/AP hide caption
The Rev. Raphael Warnock and Jon Ossoff, seen here during a campaign event in Georgia on Jan. 4, were sworn in as U.S. senators by Vice President Harris on Wednesday afternoon. Michael M. Santiago/Getty Images hide caption
President Biden and first lady Jill Biden arrive at the White House on Wednesday. The Biden administration has made several changes to the White House website with an eye toward inclusivity and accessibility. Jim Watson/AFP via Getty Images hide caption
Stocks hit record highs on Wednesday after President Biden's inauguration. Angela Weiss/AFP via Getty Images hide caption
From left to right: Doug Emhoff, Kamala Harris, Jill Biden and Joe Biden as they arrive at the U.S. Capitol for the inauguration. Joe Raedle/Getty Images hide caption
A man wears a QAnon shirt while boarding a shuttle bus in Londonderry, N.H., on Aug. 28, 2020. Joseph Prezioso/AFP via Getty Images hide caption
President Biden has vowed quick action on climate change, appointing the largest climate staff of any president. Alex Edelman/AFP via Getty Images hide caption
High winds blow a hat by as President Biden, first lady Jill Biden, Vice President Harris and second gentleman Douglas Emhoff walk down the steps of the Capitol. Pool/Getty Images hide caption
Kamala Harris is sworn as vice president by U.S. Supreme Court Associate Justice Sonia Sotomayor as her husband Doug Emhoff looks on. Alex Wong/Getty Images hide caption
People arrive for the 59th Presidential Inauguration at the U.S. Capitol in Washington on Wednesday, Jan. 20, 2021. Carolyn Kaster/AP hide caption
Capt. Andrea Hall, a firefighter from Fulton County, Ga., delivers the pledge of allegiance during the 59th Presidential Inauguration on Wednesday. Erin Schaff/Pool via Reuters hide caption