A pigeon, known as Siyah Kinifirli, with an approximate market value of 1000 Turkish Lira ($263), bred by 23-year-old Ismail Ozbek, is pictured in Sanliurfa, Turkey, December 23, 2016. As night-time approaches in Sanliurfa, southeastern Turkey, most of the alleyways of the city's old bazaar are emptying out of buyers and vendors, except for one. (Photo by Umit Bektas/Reuters)

Cheng Liping, whose husband Ju was onboard Malaysia Airlines Flight MH370 which disappeared on March 8, 2014, shows a picture of she and her husband together and an old card with a message given by her husband, at a park near her house where she and her husband used to visit during an interview with Reuters in Beijing July 24, 2014. Cheng said her life has been totally changed since the incident. Their two little sons, who don't know about this incident, keep asking her when their dad is coming back. Six months after Malaysia Airlines Flight MH370, with 239 mostly Chinese people on board, disappeared about an hour into a routine journey from Kuala Lumpur to Beijing March 8, loved ones of missing passengers derive what comfort they can from what's left behind after the world's greatest aviation mystery. More than two dozen countries have been involved in the air, sea and underwater search for the Boeing 777 but months of sorties failed to turn up any trace – even after narrowing the search area to the southern Indian Ocean – long after batteries on the black box voice and data recorders had gone flat. (Photo by Kim Kyung-Hoon/Reuters)

July 23, 2013 – Kampala, Uganda. Helene and Diana train daily more than 2.5 hours by Innocent Kapalata, a passionate and ambitious former boxer. Amidst the shanty homes a group of ambitious fighters are trying to reach for a better life. (Photo by Peter Bauza/ZUMA Press/VISUAL Press)

Tlingit Tribal members from Klawock, Alaska Eva Rowan, center, and Jonathan Rowan, right, watch Okolani Tallett perform a hula dance at the Honolulu Museum of Arts, Thursday, October 22, 2015, in Honolulu. A totem pole, stolen by actor John Barrymore during a sailing trip to Alaska in 1931, was returned to the Tribe today by the Honolulu Museum of Arts where it was on display since the early 1980s. The totem pole was carved by the ancestors of the Tlingit Tribe. (Photo by Marco Garcia/AP Photo)

A zoo employee feeds a 3-week-old Eurasian eagle owl at the Royev Ruchey zoo on the suburbs of the Siberian city of Krasnoyarsk, Russia June 7, 2016. (Photo by Ilya Naymushin/Reuters)

Casey Stoner of Australia and Repsol Honda Team rounds the bend during the third day of MotoGP testing at Sepang Circuit on February 2, 2012 in Kuala Lumpur, Malaysia. (Photo by Mirco Lazzari gp/Getty Images)

Farmworkers clear weeds in a strawberry field at a farm in Huaral on the outskirts of Lima, Peru, August 5, 2015. Farmers in northern Lima use pressurized irrigation and plastic wraps for efficient production of strawberries in a coastal area with little water, according to local media. (Photo by Mariana Bazo/Reuters)

An ice covered entrance door to the international gene bank Svalbard Global Seed Vault (SGSV) near Longyearbyen on Spitsbergen, Norway, October 20, 2015. Two consignments of crop seeds will be deposited next year in a “doomsday vault” built in an Arctic mountainside to safeguard global supplies. The vault, which opened on the Svalbard archipelago in 2008, is designed to protect crop seeds, such as beans, rice and wheat against the worst cataclysms of nuclear war or disease. (Photo by Anna Filipova/Reuters)