The 644th Combat Communications Squadron members work together to build tents at the simulated Forward Operating Base Dragon Hill April 19, 2012, Andersen Air Force Base, Guam. The 644 CBCS is conducting a deployment exercise from April 16 to 27 in order to test their capabilities in the field and improve their war-fighting capabilities. (U.S. Air Force photo by Airman 1st Class Marianique Santos)