Master Sgt. Jeff Ruckman (left), Staff Sgt. Aaron Walson and Airman First Class Brian J. Hunt, engineers from Elmendorf Air Force Base, Alaska, finish the installation of a window at the medical clinic in Truong Thanh, Vietnam, May 13, 2010. Operation Pacific Angel is a joint and combined humanitarian and civic assistance operation conducted in the Pacific area of responsibility to support U.S. Pacific Command's capacity-building efforts. More than 50 U.S. military members are working alongside the Vietnamese military, non-governmental organizations and civil health personnel in medical and engineering efforts during the mission scheduled through May 15 2010. (U.S. Air Force photo/Capt. Timothy Lundberg)