U.S. Marine Sgt. Maj. David A. Wilson, left, and U.S. Marine Cpl. Ubaldo F. Ozaeta install a single air motor servo unit on Camp Bastion, Helmand province, Afghanistan, July 15, 2013. Wilson and Ozaeta, powerline mechanics, are assigned to Marine Attack Squadron 311. The unit allows AV-8B Harriers to take off vertically. U.S. Marine Sgt. Maj. David A. Wilson, left, and U.S. Marine Cpl. Ubaldo F. Ozaeta install a single air motor servo unit on Camp Bastion, Helmand province, Afghanistan, July 15, 2013. Wilson and Ozaeta, powerline mechanics, are assigned to Marine Attack Squadron 311. The unit allows AV-8B Harriers to take off vertically. SHARE: Download: Full Size (2.15 MB) Tags: Photo Essays Credit: VIRIN: 360922-P-USC87-683.jpg Photo Gallery