Dancers at the Windmill Theatre in London, England practice a routine wearing gas masks and hard-hats with their costumes, 1940. (Photo by Hulton Archive/Getty Images)
A man wearing a floral arrangement on his back takes part in the annual flower parade, in which flower growers known as “silleteros” present their floral arrangements, in Medellin, Colombia, August 9, 2015. (Photo by Fredy Builes/Reuters)