Couples compete in the Salon Tango style qualifier round at the Tango World Championship in Buenos Aires, Argentina, August 22, 2016. (Photo by Enrique Marcarian/Reuters)

Maksym Demchuk of Ukraine takes part in the FAI World Hot Air Balloon Championship near Gross-Siegharts, Austria on August 20, 2018. (Photo by Heinz-Peter Bader/Reuters)

An RAF Eurofighter EF-2000 Typhoon takes off on March 22, 2011 at the Gioia Del Colle airbase in Italy. After last week's UN resolution which voted for a non-fly zone to be enforced over Libya, sorties have continued to be flown by forces representing the UN coalition from Italian military bases. More than 110 missiles have been fired on pro-Gaddafi strongholds in attempt to knock out the Libyan leaders defences.

The new Amazon tablet called the Kindle Fire is displayed on September 28, 2011 in New York City. The Fire, which will be priced at $199, is an expanded version of the company's Kindle e-reader that has 8GB of storage and WiFi. The Fire gives users access to streaming video, as well as e-books, apps and music, and has a Web browser. In addition to the Fire, Bezos introduced four new Kindles including a Kindle touch model. (Photo by Spencer Platt/Getty Images)

Employees work at a sorting centre of Zhongtong (ZTO) Express ahead of the Singles Day shopping festival, Chaoyang District, Beijing, November 8, 2015. On China's giant Singles Day internet shopping festival, the country's delivery firms are stretched so thin that they are looking for tie-ups, listings and new investors to husband their resources. (Photo by Jason Lee/Reuters)

Tourists standing near the sea shore are hit by a wave, which surged past a barrier under the influence of Typhoon Chan-hom, in Qingdao, Shandong province, China, July 12, 2015. One of the most powerful typhoons to strike eastern China in decades disrupted air, rail and sea transport on Saturday after forcing the evacuation of more than a million people from the provinces of Zhejiang and Jiangsu, state media reported. (Photo by Reuters/Stringer)

A rescuer saves a resident from a flooded area in Wuhan, Hubei Province, China, July 2, 2016. (Photo by Reuters/China Daily)

Monks take pictures with their mobile phones of the mummified body of a monk at Puzhao temple in Quanzhou, Fujian Province, China, January 10, 2016. According to local media, the monk named Fuhou died three years ago at the age of 94 and his remains was placed in a vat and turned into a mummy as a sign of respect. (Photo by Reuters/Stringer)