The Imperial Russian Ballet members wait to perform Tchaikovsky's “Swan Lake” at Arena hall in central Bosnian town of Zenica December 7, 2014. (Photo by Dado Ruvic/Reuters)

Model Georgia Salpa attends the UK Premiere of “A Good Day To Die Hard” at Empire Leicester Square on February 7, 2013 in London, England. (Photo by UK Press)

Model Miranda Kerr attends the after party for the 2012 Victoria's Secret Fashion Show at Lavo NYC on November 7, 2012 in New York City. (Photo by Jim Spellman/WireImage)

Pets get ready before running a mini-marathon for dogs in Bangkok, Thailand May 7, 2017. From tiny chihuahuas to 60 kg (130 lb) mastiffs, hundreds of dogs and their owners jogged through a Bangkok park on Sunday to raise money for charity. (Photo by Jorge Silva/Reuters)

An Afghan National Army (ANA) helicopter flies over a soldier during a training exercise at the Kabul Military Training Centre in Afghanistan October 7, 2015. (Photo by Ahmad Masood/Reuters)

Model Daisy Lowe presents a creation at the Katie Eary catwalk show during London Fashion Week Men's 2017 in London, Britain January 7, 2017. (Photo by Neil Hall/Reuters)

A roadside ice-cream vendor waits for customers at a market in New Delhi, India, April 7, 2016. The Indian economy is characterized by the existence of a vast majority of informal or unorganized labor employment. (Photo by Altaf Qadri/AP Photo)

A zoo performer smiles as he puts his head between the jaws of a crocodile during a performance for tourists at the Sriracha Tiger Zoo, in Chonburi province, east of Bangkok,Thailand, June 7, 2016. (Photo by Chaiwat Subprasom/Reuters)