Fans wearing face masks to help protect against the spread of the new coronavirus watch the KBO league game between Doosan Bears and LG Twins in Seoul, South Korea, Sunday, July 27, 2020. Masked fans hopped, sang and shouted cheering slogans in baseball stadiums in South Korea on Sunday as authorities began bringing back spectators in professional sports games amid the coronavirus pandemic. (AP Photo/Ahn Young-joon)

The Vatican Apolstolic Palace is reflected in a man's sunglasses as Pope Francis recites the Angelus noon preyer rom the window of his studio overlooking St. Peter's Square , at the Vatican, Sunday, July 26, 2020. Pope Francis called for the disarmament and clearing of mines in the Donbass area in Ukraine, saying it was essential to the peace process. (AP Photo/Riccardo De Luca)

Sunbathers enjoy the beach in Palma de Mallorca, Spain, Sunday, July 26, 2020. Britain has put Spain back on its unsafe list and announced Saturday that travelers arriving in the U.K. from Spain must now quarantine for 14 days. The move by the UK taken without forewarning has caught travelers off guard. (AP Photo/Joan Mateu)

Women wearing face masks stand on a beach in Vung Tau city, Vietnam, Sunday, July 26, 2020. Vietnam on Sunday reimposed restrictions in one of its most popular beach destinations after a second person tested positive for the virus, the first locally transmitted cases in the country in over three months. (AP Photo/Hau Dinh)

President Donald Trump boards Air Force One at Morristown Municipal Airport in Morristown, N.J., Sunday, July 26, 2020. Trump is returning to Washington after spending the weekend at his golf club in nearby Bedminster, N.J. (AP Photo/Patrick Semansky)

Policemen wearing gloves and face masks to help prevent the spread of the coronavirus, provide security for pilgrims, in Mecca, Saudi Arabia, Sunday, July 26, 2020. Only about 1,000 pilgrims will be allowed to perform the annual hajj pilgrimage that begins later this month due to the virus pandemic. (Saudi Ministry of Media via AP)

A woman wearing a mask carries her child on a beach in Vung Tau city, Vietnam, Sunday, July 26, 2020. Vietnam on Sunday reimposed restrictions in one of its most popular beach destinations after a second person tested positive for the virus, the first locally transmitted cases in the country in over three months. (AP Photo/Hau Dinh)

A Spanish flag being used as social distancing signage sticks out from the sand in Palma de Mallorca, Spain, Sunday, July 26, 2020. Britain has put Spain back on its unsafe list and announced Saturday that travelers arriving in the U.K. from Spain must now quarantine for 14 days. The move by the UK taken without forewarning has caught travelers off guard. (AP Photo/Joan Mateu)

A security guards stands watch over empty seats during the fourth inning of a baseball game between the Tampa Bay Rays and the Toronto Blue Jays Sunday, July 26, 2020, in St. Petersburg, Fla. There are no fans allowed in the stadium to help stop the spread of the corona virus. (AP Photo/Chris O'Meara)