Delta Roll The Blue Angels, the Navy’s flight demonstration squadron, perform the delta roll maneuver during a training flight over California’s Imperial Valley, Feb. 7, 2019. The Blue Angels are preparing for the 2019 show season which will include 61 flight demonstrations at 32 locations across the country. SHARE: Download: Full Size (1.33 MB) Tags: Navy, Blue Angels Credit: Petty Officer 2nd Class Christopher Gordon VIRIN: 190206-N-OY339-1580.JPG Photo Gallery