The U.S. Navy Flight Demonstration Squadron, the Blue Angels, fly in a delta formation over the Gulf of Mexico during a training flight. While the Blue Angels' 2013 air show season has been canceled due to sequestration, the pilots fly sorties to maintain proficiency in the F/A-18 Hornet. (U.S. Navy photo by Mass Communication Specialist 2nd Class Kathryn E. Macdonald/Released)