LITHUANIA AIR FORCE AIR BASE, Lithuania – Chief Master Sgt. Scott Cornell, 435th Construction and Training Squadron chief enlisted manager, Ramstein Air Base, Germany, uses a hydraulic jack hammer to drive post used to anchor a mobile aircraft arresting system into the ground. The barrier maintenance team attempted to pull the posts out of the ground, but some were too stuck in the frozen ground. (U.S. Air Force photo/Staff Sgt. Stephen Linch)