U.S. Army Spc. Mark Davis waits for a passenger to board a UH-60 Black Hawk helicopter during a mission on Forward Operating Base Shank in Logar province, Afghanistan, Oct. 9, 2013. Davis, a crew chief, is assigned to Company C, 2nd Battalion Assault, 10th Combat Aviation Brigade. U.S. Army Spc. Mark Davis waits for a passenger to board a UH-60 Black Hawk helicopter during a mission on Forward Operating Base Shank in Logar province, Afghanistan, Oct. 9, 2013. Davis, a crew chief, is assigned to Company C, 2nd Battalion Assault, 10th Combat Aviation Brigade. SHARE: Download: Full Size (2.17 MB) Tags: Photo Essays Credit: VIRIN: 048929-V-ODY69-050.jpg Photo Gallery