A pilot inflates a hot air balloon while taking part in the 38th International Balloon Festival of Chateau-d'oex, Switzerland, 23 January 2016. The festival takes place from 23 to 31 January. (Photo by Vincent Vannay/EPA)

A woman aims a World War II machine gun at a military show during celebration of the Defenders of the Fatherland Day in St.Petersburg, Russia, Tuesday, February 23, 2016. The day, celebrated in Russia on February 23, honors the nation's military and is a nationwide holiday. (Photo by Dmitri Lovetsky/AP Photo)

A model presents a creation by Australian designers Tamara Ralph and Michael Russo as part of their Haute Couture Spring/Summer 2017 fashion show for Ralph & Russo in Paris, France January 23, 2017. (Photo by Gonzalo Fuentes/Reuters)

People try to keep warm their hands by a heater as they wait for their seats outside a restaurant at an outdoor shopping mall in Beijing, Saturday, December 23, 2023. A cold wave began earlier in the week bringing extensive snowfall and freezing temperatures across China. (Photo by Andy Wong/AP Photo)

Passengers travel in an overcrowded train in the eastern Indian city of Patna, February 23, 2010. (Photo by Krishna Murari Kishan/Reuters)

A worker applies colour to strings which will be used to fly kites, by a roadside in Ahmedabad, India, November 23, 2017. (Photo by Amit Dave/Reuters)

People are caught in a dust storm in New Delhi, India May 23, 2016. (Photo by Anindito Mukherjee/Reuters)

Festival goers arrive for the Glastonbury festival at Worthy Farm, in Somerset, England, Thursday, June 23, 2016. (Photo by Guy Bell/Rex Features/Shutterstock)