A Papuanese tribal man poses for a photograph during the Baliem Valley Festival on August 9, 2010 in Wamena, Indonesia. The Dani, Yali and Lani tribes gather at this annual festival each dressed in distinctive tribal attire, stage mock battles, perform traditional music and dance, and celebrate with a pig feast. (Photo by Ulet Ifansasti/Getty Images)

An Airbus 380 prepares to land after its demonstration flight during the closing day of the Paris Air Show in Le Bourget, north of Paris, Sunday, June 21, 2015. Some 300,000 aviation professionals and spectators are expected at this weekends Paris Air Show, coming from around the world to make business deals and see dramatic displays of aeronautic prowess and the latest air and space technology. (AP Photo/Michel Euler)