May 31,2021

U.S. President Joe Biden delivers the Memorial Day speech during the National Memorial Day observance at Arlington National Cemetery in Arlington, Virginia.

A crab roams on a beach polluted with polythene pellets that washed ashore from burning ship MV X-Press Pearl anchored off Colombo port at Kapungoda, out skirts of Colombo, Sri Lanka.

Health workers conduct a COVID-19 swab test on residents at a village in Quezon City, Philippines.

This aerial photograph taken on May 30, 2021 shows mucilage, a thick, viscous fluid produced by phytoplankton, in Turkey's Marmara Sea at a harbor on the shoreline of Istanbul.

Spectators take photos of a new statue of Spain's Rafael Nadal on day two of the French Open tennis tournament at Roland Garros in Paris, France.

This aerial photo shows the column of ash expelled from the crater of Nyiragongo volcano, north of Goma, the provincial capital of North Kivu, Democratic Republic of Congo, May 30, 2021.

People are silhouetted against a hot air balloon during a balloon glow as part of Memorial Day weekend activities on the grounds of the National World War I Museum and Memorial, Sunday, May 30, 2021, in Kansas City, Mo. (AP Photo/Charlie Riedel)

A surfer heads out to sea, as people flock to the beach to enjoy the Memorial Day long weekend, in Santa Monica, California, May 30, 2021.

A participant of a half-marathon race is sprayed with water during hot weather in Omsk, Russia, May 30, 2021.

Spectators react as drivers take their first lap at the Indy 500, the largest attended sporting event since the start of the coronavirus disease (COVID-19) pandemic, in Indianapolis, Indiana, May 30, 2021.