Sgt. Zach Smola, rear door gunner on a CH-47, keeps watch on the mountains in Uruzgan province, Afghanistan, May 12, 2013. The Chinooks, operated by members of Bravo Company, 2nd Battalion, 104th Aviation Regiment, have played a vital part in the mission in Afghanistan since their arrival in December 2012 by performing resupply, retrograde, and planned missions. U.S. Army photo by Sgt. Jessi Ann McCormick.