Students training to be flight attendants hold books on their heads, chopsticks in their mouths, and papers in between their knees, as they take part in a standing posture practice at a vocational school in Shijiazhuang, Hebei province, China May 4, 2017. (Photo by Reuters/Stringer)

A worker heats a glass cat-shape ornament at the Silverado manufacture of hand-blown Christmas ornaments in town of Jozefow outside Warsaw December 2, 2014. (Photo by Kacper Pempel/Reuters)

Tank crew standing in front of M-4 tank, Ft. Knox, Kentucky, June, 1942. (Alfred Palmer/OWI/LOC)

In this January 27, 2015 photo, penguins walk on the shore of Bahia Almirantazgo in Antarctica. Antarctica “is big and it's changing and it affects the rest of the planet and we can't afford to ignore what's going on down there”, said David Vaughan, science director of the British Antarctic Survey. (Photo by Natacha Pisarenko/AP Photo)

Actors perform a scene in a film directed by Humam Husari in the rebel-held besieged town of Zamalka, in the Damascus suburbs, Syria September 19, 2016. (Photo by Bassam Khabieh/Reuters)

Forgotten Guerrero. A female member of the community defence force holds her weapon. Since early 2019, the village has been attacked repeatedly by Los Ardillos cartel, prompting residents to take action. Rincón de Chautla, Guerrero, 10 June 2019. (Photo by Alfredo Bosco/Luz with the support of Le Figaro Magazine, Winner of the 2020 Humanitarian Visa d’or award, International Committee of the Red Cross/International Festival of Photojournalism 2020)

Hindu devotees run through red hot embers as part of annual fire walking ritual during “Draupadi Amman” festival in Bangalore on June 9, 2019. (Photo by Manjunath Kiran/AFP Photo)

Canada's New Democratic Party (NDP) leader Jagmeet Singh meets with young adults outside Ryerson University during an election campaign stop in Toronto, Ontario, Canada on October 8, 2019. (Photo by Chris Helgren/Reuters)