MCGHEE TYSON AIR NATIONAL GUARD BASE, Tenn. - Tech. Sgt. Donald O. Noel, instructor, discusses social media do's and don't's in the military to NCO Academy Class 14-5, B-flight on the I.G. Brown Training and Education Center campus here, May 9, 2014. (U.S. Air National Guard photo by Master Sgt. Kurt Skoglund/Released)