Troop Line Defense Secretary Ash Carter shakes hands with a soldier in a troop line at the Soldier Readiness Processing and Family Assistance Center on Fort Campbell, Ky., Jan. 13, 2016. DoD photo by Army Sgt. 1st Class Clydell Kinchen SHARE: Download: Full Size (0.81 MB) Credit: Sgt. 1st Class Clydell Kinchen VIRIN: 160113-D-LN567-630.JPG Photo Gallery