Sailors assigned to the avionics work center of the U.S. Navy Flight Demonstration Squadron troubleshoot a heads up display. Sailors assigned to the avionics work center of the U.S. Navy Flight Demonstration Squadron, the Blue Angels, troubleshoot a heads up display during a morning turns evolution in El Centro, Calif., on Jan. 20, 2011. The Blue Angels are deployed to El Centro to prepare for the upcoming air show season. SHARE: Download: Full Size (0.05 MB) Credit: VIRIN: 387404-N-CHX84-205.jpg Photo Gallery