U.S. Army Col. Dennis Sullivan, commander of 2nd Brigade Combat Team, 10th Mountain Division, left, bids farewell to Command Sgt. Maj. Alonzo Smith, senior enilsted adviser with the Combined Joint Task Force 101 and Regional Command East on Forward Operating Base Sharana, Paktika province, Afghanistan, March 21, 2013. (U.S. Army photo by Spc. Candace Foster/Released)