Nick Minzghor performs a safety search on Michael Brady prior to starting the Active Shooter Training Course at Mt. Pleasant, S.C., Feb. 23, 2010. The AST course prepares first responders on how to react to a hostile situation. Mr. Minzghor is the lead instructor of AST and Mr. Brady is the supervisory police officer with the 628th Security Forces Squadron at Joint base Charleston. (U.S. Air Force photo by James M. Bowman/released) (Photo by James M. BowmanReleased)

Nick Minzghor briefs participants on upcoming activities prior to starting the Active Shooter Training Course at Mt. Pleasant, S.C., Feb. 23, 2010. The AST course prepares first responders on how to react to a hostile situation. Mr. Minzghor is the lead instructor of AST. (U.S. Air Force photo by James M. Bowman/released) (Photo by James M. BowmanReleased)

U.S. Air Force Tech. Sgt. Bradley Krause performs a hallway clearing during a mock hostile situation during the Active Shooter Training Course at Mt. Pleasant, S.C., Feb. 23, 2010. The AST course prepares first responders on how to react to a hostile situation. Sergeant Krause is with the 50th Security Forces Squadron and is the Non-commissioned officer in charge of training he is stationed at Schriever Air Force Base, Colo. (U.S. Air Force photo by James M. Bowman/released) (Photo by James M. BowmanReleased)

U.S. Air Force Chief Master Sgt. Tim Winfree (left) and Tech. Sgt Bradley Krause subdue an aggressor during a mock hostile situation at the Active Shooter Training Course at Mt. Pleasant, S.C., Feb. 23, 2010. The AST course prepares first responders on how to react to a hostile situation. Chief Winfree is the 50th Mission Support Group superintendent and Sergeant Krause is the NCIOC of training with the 50th Security Forces, both are from Schriever AFB, Colo. (U.S. Air Force photo by James M. Bowman/released) (Photo by James M. BowmanReleased)

Mock hostages run by as security forces members prepare to shoot an aggressor during the Active Shooter Training Course at Mt. Pleasant, S.C., Feb. 23, 2010. The AST course prepares first responders on how to react to a hostile situation. (U.S. Air Force photo by James M. Bowman/released) (Photo by James M. BowmanReleased)

Security forces members prepare to shoot an aggressor during the Active Shooter Training Course at Mt. Pleasant, S.C., Feb. 23, 2010. The AST course prepares first responders on how to react to a hostile situation. (U.S. Air Force photo by James M. Bowman/released) (Photo by James M. BowmanReleased)

U.S. Air Force Staff Sgt. Brady Frazier provides rear cover during a hallway clearing scenario during the Active Shooter Training Course at Mt. Pleasant, S.C., Feb. 23, 2010. The AST course prepares first responders on how to react to a hostile situation. (U.S. Air Force photo by James M. Bowman/released) (Photo by James M. BowmanReleased)

U.S. Air Force Staff Sgt. Brady Frazier provides rear cover during a hall clearing scenario during the Active Shooter Training Course at Mt. Pleasant, S.C., Feb. 23, 2010. The AST course prepares first responders on how to react to a hostile situation. (U.S. Air Force photo by James M. Bowman/released) (Photo by James M. BowmanReleased)

Law enforcement and Air Force security members prepare to engage an aggressor during Active Shooter Training Course at Mt. Pleasant, S.C., Feb. 23, 2010. The AST course prepares first responders on how to react to a hostile situation. (U.S. Air Force photo by James M. Bowman/released) (Photo by James M. BowmanReleased)

Patrolman Sean Fox and other members prepare to engage an aggressor during the Active Shooter Training Course at Mt. Pleasant, S.C., Feb. 23, 2010. The AST course prepares first responders on how to react to a hostile situation. Mr. Fox is with Charleston county aviation authority police department. (U.S. Air Force photo by James M. Bowman/released) (Photo by James M. BowmanReleased)

Dennis rushes into a room to clear the area during the Active Shooter Training Course at Mt. Pleasant, S.C., Feb. 23, 2010. The AST course prepares first responders on how to react to a hostile situation. Dennis is with the U.S. Marshals Service in Charleston, S.C. (U.S. Air Force photo by James M. Bowman/released) (Photo by James M. BowmanReleased)

U.S. Air Force Master Sgt. David Dalbec, clears a room during the Active Shooter Training Course in Mt. Pleasant, S.C., Feb. 23, 2010. The AST course prepares first responders on how to react to a hostile situation. Sergeant Dalbec is an combat arms instructor with the 148th Fighter wing Duluth, Minn. (U.S. Air Force photo by James M. Bowman/released) (Photo by James M. BowmanReleased)

U.S. Air Force Tech. Sgt. Chris Stenke opens fire on a perpetrator during a clearing room exercise while participating in the Active Shooter Training Course at Mt. Pleasant, S.C., Feb. 23, 2010. The AST course prepares first responders on how to react to a hostile situation. Sergeant Stenke is the NCOIC of training with the 61st Security Forces Squadron at Los Angeles Air Force Base. (U.S. Air Force photo by James M. Bowman/released) (Photo by James M. BowmanReleased)

U.S. Air Force security forces members clear a room during a mock hostage exercise while participating with the Active Shooter Training Course in Mt. Pleasant, S.C., Feb. 23, 2010. The AST course prepares first responders on how to react to a hostile situation. (U.S. Air Force photo by James M. Bowman/released) (Photo by James M. BowmanReleased)

Don Kjellman opens fire on an perpetrator during a clearing room exercise while attending the Active Shooter Training Course in Mt. Pleasant, S.C., Feb. 23, 2010. The AST course prepares first responders on how to react to a hostile situation. Mr. Kjellman is a Deputy Sheriff with the Charleston County Sheriff Department. (U.S. Air Force photo by James M. Bowman/released) (Photo by James M. BowmanReleased)

U.S. Air Force Chief MSgt. Tim Winfree opens fire on a perpetrator during a clearing room exercise while attending the Active Shooter Training Course in Mt. Pleasant, S.C., Feb. 23, 2010. The AST course prepares first responders on how to react to a hostile situation. Chief Winfree is the superintendent with the 50th Mission Support Group at Schriever AFB, Colo. (U.S. Air Force photo by James M. Bowman/released) (Photo by James M. BowmanReleased)

U.S. Air Force Tech. Sgt. Chad Murphy opens fire on a perpetrator during a clearing room exercise while attending the Active Shooter Training Course in Mt. Pleasant, S.C., Feb. 23, 2010. The AST course prepares first responders on how to react to a hostile situation. Sergeant Murphy is the Non-Commissioned Officer in Charge of Operations with the 628th Security Forces Squadron. (U.S. Air Force photo by James M. Bowman/released) (Photo by James M. BowmanReleased)

U.S. Air Force Staff Sgt. Brady Frazier loads an M-9 with simunitions prior to starting the Active Shooter Training Course at Mt. Pleasant, S.C., Feb. 23, 2010. The AST course prepares first responders on how to react to a hostile situation. Sergeant Frazier is a security forces member with the 628 Security Forces Squadron at Joint Base Charleston. (U.S. Air Force photo by James M. Bowman/released) (Photo by James M. BowmanReleased)

Mock hostages run by as Charleston county aviation authority police prepare to shoot an aggressor during the Active Shooter Training Course at Mt. Pleasant, S.C., Feb. 23, 2010. The AST course prepares first responders on how to react to a hostile situation. (U.S. Air Force photo by James M. Bowman/released) (Photo by James M. BowmanReleased)

Darrion Holiwell observes as Charleston county aviation authority police prepare to start a hallway clearing exercise during the Active Shooter Training Course at Mt. Pleasant, S.C., Feb. 23, 2010. The AST course prepares first responders on how to react to a hostile situation. Mr. Holiwell is an instructor with AST. (U.S. Air Force photo by James M. Bowman/released) (Photo by James M. BowmanReleased)