South Carolina Air National Guard F-16 Fighting Falcon

A U.S. Air Force fighter pilot with the 157th Fighter Squadron, South Carolina Air National Guard at McEntire Joint National Guard Base, launches an F-16 Block 52 fighter jet for a mission during a Phase II Readiness Exercise April 13, 2013. Members of the 169th Fighter Wing are preparing for a Phase I and II Readiness Inspection, which evaluates a unit’s ability to deploy, then operate and launch missions in a chemical combat environment. (U.S. Air National Guard photo by Staff Sgt. Jorge Intriago/Released)

South Carolina Air National Guard F-16 Fighting Falcon

A U.S. Air Force fighter pilot with the 157th Fighter Squadron, South Carolina Air National Guard at McEntire Joint National Guard Base S.C., taxis an F-16 Block 52 fighter jet after flying a mission during the Phase II Readiness Exercise April 13, 2013. Members of the 169th Fighter Wing are preparing for a Phase I and II Readiness Inspection, which evaluates a unit???s ability to deploy, then operate and launch missions in a chemical combat environment. (U.S. Air National Guard photo by Staff Sgt. Jorge Intriago/Released)

South Carolina Air National Guard F-16 Fighting Falcon

A U.S. Air Force fighter pilot with the 157th Fighter Squadron, South Carolina Air National Guard at McEntire Joint National Guard Base, lands after flying a mission during the Phase II Readiness Exercise, April 12, 2013. Members of the 169th Fighter Wing are preparing for a Phase I and II Readiness Inspection, which evaluates a unit?s ability to deploy, then operate and launch missions in a chemical combat environment. (U.S. Air National Guard photo by Tech. Sgt. Caycee Watson/Released)

South Carolina Air National Guard F-16 Fighting Falcon

A U.S. Air Force fighter pilot with the 157th Fighter Squadron, South Carolina Air National Guard at McEntire Joint National Guard Base, launches an F-16 fighter jet for a mission during a Phase II Readiness Exercise, April 12, 2013. Members of the 169th Fighter Wing are preparing for an upcoming Phase I and II Readiness Inspection. The RI evaluates a unit???s ability to process personnel and equipment from home station to a deployed location safely and efficiently, then operate and launch missions in a chemical combat environment. (U.S. Air National Guard photo by Tech. Sgt. Caycee Watson/Released)

South Carolina Air National Guard F-16 Fighting Falcon

A U.S. Air Force F-16 Fighting Falcon fighter pilot from the 157th Fighter Squadron, South Carolina Air National Guard, takes off from McEntire Joint National Guard Base, Nov. 16, 2012. (U.S. Air National Guard photo by Senior Master Sgt. Edward Snyder/Released)

South Carolina Air National Guard F-16 Fighting Falcon

A U.S. Air Force F-16 Fighting Falcon fighter pilot from the 157th Fighter Squadron, South Carolina Air National Guard, takes off from McEntire Joint National Guard Base, Nov. 16, 2012. (U.S. Air National Guard photo by Senior Master Sgt. Edward Snyder/Released)