Two unmanned combat vehicle. The X-47B is from 2011 developed from the X-47A Pegasus from 2003.
Both vehicles can only be seen in 3D mode. the Pegasus in ordinary view.
Google Earth time slider 10/2016
Northrop Grumman X-47B and X-47A Pegasus at Skunk Works
This map has better detail in Google Earth than Google Maps