U.S. Marine Corps Maj. Brent Stevens, the left wingman for the 2011 U.S. Navy Flight Demonstration Squadron, the Blue Angels, performs a looping maneuver over Naval Air Station Pensacola, Fla., during a practice flight May 17, 2011.
(DoD photo by Mass Communication Specialist 3rd Class Andrew Johnson, U.S. Navy/Released). Original public domain image from Flickr