The U.S. Navy's flight demonstration team, Blue Angels perform the Diamond Formation Loop maneuver.

San Francisco, Calif. (Oct. 10, 2003) The U.S. Navy's flight demonstration team, "Blue Angels" perform the "Diamond Formation Loop" maneuver over Alcatraz Island during the San Francisco Air Show. The Blue Angels perform more than 70 shows at 34 different locations throughout the country each year. U.S. Navy photo by Photographer's Mate 1st Class Casey Akins. File# 031010-N-4534A-001