An employee of the National Park Service takes a selfie with President Barack Obama, left, in the background meeting with the crowd after a tour of Everglades National Park on Earth Day, Wednesday, April 22, 2015, in Florida. Obama used the visit to warn of the damage that climate change is already inflicting on the nation's environmental treasures. (Photo by Lynne Sladky/AP Photo)

An instructor (C) adjusts the posture of students of flight attendant major during a training session at Anhui Foreign Languages University, in Hefei, Anhui province, China, May 25, 2015. (Photo by Reuters/China Daily)

A brilliant sunset makes for a fun silhouette picture by jumping between sand bars at Shi Shi Beach on the Olympic Peninsula Friday July 17, 2015. (Photo by Bettina Hansen/The Seattle Times)

Thai classical dancers perform for Phra Phrom, the Thai interpretation of the Hindu god Brahma, at the Erawan Shrine in Bangkok, Thailand, Friday, September 4, 2015. Thai authorities unveiled the restored centerpiece Friday of the Erawan Shrine, in the latest bid to restore confidence among Bangkok's tourism and business communities almost three weeks after a deadly bombing. (Photo by Sakchai Lalit/AP Photo)

Supporters of the presidential candidate Muhammadu Buhari and his All Progressive Congress hits another supporter with a motorbike during celebrations in Kano, Nigeria March 31, 2015. (Photo by Goran Tomasevic/Reuters)

Tourists pose for photos at the Skybox at Kuala Lumpur Tower in Kuala Lumpur, Malaysia, Wednesday, July 1, 2020. Malaysia entered the Recovery Movement Control Order (RMCO) after three months of coronavirus restrictions. (Photo by Vincent Thian/AP Photo)

Drinkers leave the bars as police patrol in Soho, in central London on September 24, 2020 as the clock nears 10pm, on the first day of the new earlier closing times for pubs and bars in England and Wales, introduced to combat the spread of the coronavirus. Britain has tightened restrictions to stem a surge of coronavirus cases, ordering pubs to close early and advising people to go back to working from home to prevent a second national lockdown. (Photo by Tolga Akmen/AFP Photo)

A man arrested for protesting over human rights abuses makes a court appearance in leg irons at the magistrates courts in Harare, Monday, September 14, 2020. Human rights defenders say it appears the government is using restrictions imposed to combat COVID-19 to suppress political criticism. Opposition officials, human rights groups and some analysts accuse Mnangagwa of abusing the rights of critics, using tactics as harsh as his predecessor, the late Robert Mugabe. (Photo by Tsvangirayi Mukwazhi/AP Photo)