Very, very rare for the Air Force Cross to be awarded, much less to an enlisted guy.  Absolutely outstanding!

Combat controller receives Air Force Cross, Purple Heart

Secretary of the Air Force Michael B. Donley presents Staff Sgt. Zachary Rhyner the Air Force Cross March 10 at Pope Air Force Base, N.C. Sergeant Rhyner of the 21st Special Tactics Squadron received the medal 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)

http://www.af.mil/news/story.asp?id=123139145

More details including video of the ceremony here:
“Airman gets medal for valor”