Craig Mansfield, father of the late Senior Airman Kristopher Mansfield, addresses a crowd during a tree-lighting ceremony Dec. 9, 2013, at Buckley Air Force Base, Colo. The tree was lit in memory of Kristopher, a former 460th Space Communications Squadron member who was killed by a drunk driver. Family and friends decorate the tree annually in celebration of Mansfield’s life and what he meant to the squadron. (U.S. Air Force photo by Airman 1st Class Samantha Saulsbury/Released)