That's No Spaceship Over Area 51, It's a Google Balloon
 

The desert of Nevada has been invaded by what some may describe as a UFO given their close proximity to the infamous Area 51, but you can relax, there are no little gray men, no UFO and no invasion, it's only Google and their Project Loon high altitude technology platforms doing a little testing. In addition, it filed a request to the Federal Communications Commission (FCC) in September, seeking permission to test its aerial balloons with swathes of radio spectrum usually used for 4G LTE services.

http://www.hardocp.com/news/2014/04/...g le_balloon/