A young man leaps across stellae at the Memorial to the Murdered Jews of Europe, also called the Holocaust Memorial, on January 26, 2012 in Berlin, Germany. (Photo by Sean Gallup/Getty Images)

A competitor calls with a shell at the German championships in Deer-Calling at the “Jagd & Hund” (hunting & dog) exhibition in Dortmund February 6, 2015. Competitors use specially designed instruments or ox horns to imitate the mating call of red deers. About 750 exhibitors will present their latest developments at the 34th “Jagd & Hund” exhibition, which runs from February 3 to February 8. (Photo by Ina Fassbender/Reuters)

Students play in their school yard on the first day of the new school term at a primary school in Baghdad, October 18, 2015. (Photo by Ahmed Saad/Reuters)

A girl plays with coloured chicks for sale prior to Easter celebrations in Byblos, Lebanon on March 22, 2015. (Photo by Jamal Saidi/Reuters)

Maria Menounos and Derek Hough sit courtside as the Celtics play the Lakers in Los Angeles, March 2012. (Photo by Lucy Nicholson/Reuters)

Ecuadorian luthier Ivan Ibujes plays a guitar after repairing it at his shop in Quito, June 17, 2016. (Photo by Guillermo Granja/Reuters)

A local boy plays football on Iracema Beach on June 11, 2014 in Fortaleza, Brazil. (Photo by Robert Cianflone/Getty Images)

Boys play with a drainage culvert used for flood control in Las Pinas, Metro Manila February 28, 2016. (Photo by Erik De Castro/Reuters)