Airman 1st Class Joe Nguyen, 744th Communications Squadron network infrastructure technician, uses a fluke meter to test the consistency of cables on a CISCO Switch. On his first deployment to Afghanistan, from December 2008 to June 2009, Airman Nguyen served as the only certified Air Force MK-19 gunner for the Marine 201st 3rd Brigade. (U.S. Air Force photo/ Bobby Jones)