Republic of Singapore Air Force Military Expert 6 Nagenthiran Thurairaj, a 508th Engineer Squadron commanding officer, assembles a frame for a small shelter system during Partner Nation Silver Flag Feb. 13, 2016, at Andersen Air Force, Guam. The exercise was a small part of the first Partner Nation Silver Flag exercise, an event where partner nations were presented the opportunity to travel to Guam to trade engineering practices with each other and the U.S. Air Force. (U.S. Air Force photo/Senior Airman Joshua Smoot)