North Korean bodyguards run along a limousine transporting Kim Jong Un upon his arrival in Dong Dang, Vietnam, February 26, 2019. The second meeting of the US President and the North Korean leader, running from 27 to 28 February 2019, focuses on furthering steps towards achieving peace and complete denuclearization of the Korean peninsula. (Photo by Reuters/Stringer)

Empty gloves are seen at the side of a tray of Maryland Blue Crabs at Maine Avenue Fish Market which is the United States oldest fish market in continual operation since 1805, in Washington, U.S., May 6, 2019. (Photo by Clodagh Kilcoyne/Reuters)

Drinking from a helmet at a graduation ceremony held by the Military University of the Russian Defence Ministry at Moscow's Victory Park in Moscow, Russia on June 15, 2019. (Photo by Gavriil Grigorov/TASS)

Guests arrive at the red carpet for the movie “The Truth” (La Verite) presented in competition at the 76th Venice Film Festival, in Venice, Italy, August 28, 2019. (Photo by Yara Nardi/Reuters)

The Grevy’s Illusion by Yaron Schmid, USA: a Grevy’s zebra staring at the camera in Lewa, Kenya. Third place – wildlife. (Photo by Yaron Schmid/The Nature Conservancy Global Photo Contest 2019)

A member of the riot police gets ready to repel the attacks of protesters during a protest against President Sebastian Piñera during the seventh day of protests against President Sebastian Piñera on October 24, 2019 in Santiago, Chile. Although President Sebastian Piñera announced measures to improve equality, unions called for a national strike and demonstrations continue as casualties are now at least 18. Demands behind the protest include issues like health care, pension system, privatization of water, public transport, education, social mobility and corruption. (Photo by Marcelo Hernandez/Getty Images)

University students wearing Guy Fawkes masks pose for a photoshoot of a graduation ceremony to support anti-government protests at the Hong Kong Polytechnic University, in Hong Kong, China on October 30, 2019. (Photo by Tyrone Siu/Reuters)

A gray heron (Ardea cinerea) that fished a common carp (Cyprinus carpio) in Geneva, Switzerland, 21 April 2019. (Photo by Martial Trezzini/EPA/EFE/Rex Features/Shutterstock)