Air Force Chief of Staff Gen. Norton Schwartz presents Staff Sgt. Zachary Rhyner a Purple Heart March 10 at Pope Air Force Base, N.C. Sergeant Rhyner of the 21st Special Tactics Squadron received the medal and the Air Force Cross for uncommon valor during Operation Enduring Freedom for his actions during an intense 6.5-hour battle in Shok Valley, Afghanistan, April 6, 2008. (U.S. Air Force photo)