Russian President Vladimir Putin visits the Byzantine and Christian museum in Athens, Friday, May 27, 2016. Russia's president is due in financially struggling Greece Friday for a state visit that will include a trip to a 1,000-year-old, all-male Orthodox Christian sanctuary in the north of the country. (Photo by Thanassis Stavrakis/AP Photo)

In this undated handout photograph from the “Inside Out Project”, a poster bearing the image of a Pakistani girl whose parents, lawyers say, were killed in a drone strike, lies in a field at an undisclosed location in the northwestern Khyber-Pakhtunkhwa province. A group of artists in Pakistan are hoping to generate “empathy” among US drone operators by placing giant posters of children in the country's troubled tribal regions. (Photo by AFP Photo)

Employee Sandra Jaeckel, at the photographer's request, adjusts a ribbon around the neck of a giant chocolate Easter bunny at the production facility at Confiserie Felicitas chocolates maker on April 9, 2014 in Hornow, Germany. Easter is among the busiest times of year for the chocolatier, which produces Easter bunnies and eggs in a wide variety of sizes and styles. Founded by Belgian expats Goedele Matthyssen and Peter Bientsman the company will soon celebrate its 21st year. (Photo by Sean Gallup/Getty Images)

Fire rises from an oil tank in the port of Es Sider, in Ras Lanuf, Libya January 4, 2016. Firefighters have extinguished two fires at oil storage tanks at Libya's Ras Lanuf terminal, but blazes continue at five tanks in the nearby port of Es Sider after attacks this week by Islamic State militants, a Petroleum Facilities Guards (PFG) spokesman said on Thursday. (Photo by Reuters/Stringer)

Kazakh nomads have been grazing their livestock in Mongolia for hundreds of years. Fascinated by the bond between hunter and eagle, photographer Palani Mohan has spent the last few years documenting the burkitshi. Mohan's photos of the landscape, isolation of the hunt, and most of all the trusting relationship between man and bird, convey the importance that the eagle plays in their lives. (Photo by Palani Mohan)

Workers carry sacks of coffee beans at a warehouse at the Nogales farm in Jinotega, Nicaragua January 7, 2016. Soaring temperatures in Central America due to climate change are forcing farmers to pull up coffee trees and replace them with cocoa, spurring a revival in the cultivation of a crop once so essential to the region's economy. (Photo by Oswaldo Rivas/Reuters)

People take part in the “The Burial of the Sardine” funeral procession, which marks the end of carnival festivities, in Madrid, Spain, February 10, 2016. “Mourners” carry a coffin with a mock sardine through the streets to celebrate the countdown to Lent. Spanish painter Francisco de Goya's painting “El entierro de la sardina” (The Burial of the Sardine) was inspired by this tradition, which started in Madrid in the 18th century, around the time of Spanish King Carlos III. (Photo by Juan Medina/Reuters)

Ethnic Uyghur tourists guides wait to perform in a show for Chinese tourists on June 29, 2017 in the old town of Kashgar, in the far western Xinjiang province, China. Kashgar has long been considered the cultural heart of Xinjiang for the province's nearly 10 million Muslim Uyghurs. (Photo by Kevin Frayer/Getty Images)