MITTENWALD, GERMANY - SEPTEMBER 04: A man and a woman watch goats during a goat drive down the Alps on September 4, 2010 in Mittenwald, Germany. Every year cows, sheep and goats are driven down the mountains in September after they spent about four months on the grazing lands in the Bavarian mountains. (Photo by Alexandra Beier/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)