INSTRUMENT CHECK U.S. Army Chief Warrant Officer Leonard Pearson checks his navigation instruments before going on a mission aboard a UH-60 Black Hawk helicopter from Forward Operating Base Diamondback near Mosul, Iraq, Oct. 21, 2009. Pearson is assigned to Company C, 3rd Battalion, 25th Aviation Regiment, Forward Support Medevac Team. SHARE IMAGE: Download Image: Full Size (0.07 MB) Photo By: VIRIN: 795975-F-ABM49-506.jpg Photo Gallery