U.S. Army Spc. Zachariah Buckner, a plumber with the 1151st Engineering Company, Alabama Army National Guard, attached to the 82nd Sustainment Brigade, 1st Theater Sustainment Command, cuts a beam on a building as part of retrograde operations at Bagram Airfield, Afghanistan, Feb. 3, 2014. U.S. and international forces in 2013 began the process of drawing down assets in Afghanistan ahead of the eventual transition to handing over Afghan security to Afghan forces.