Senior Airman Tony Roybal, 628th Security Forces Squadron patrolman, notifies the 628th Civil Engineering Squadron’s Explosive Ordinance Disposal team of a suspicious package at the Air Base fitness center during an exercise Jan. 14, 2015, at Joint Base Charleston, S.C. JB Charleston held an exercise Jan. 14 through 15 to test various security measures in the event of an on base disturbance. (U.S. Air Force photo/ Senior Airman Dennis Sloan)

Airmen from the 628th Force Support Squadron evacuated all individuals from the Air Base fitness center during an exercise Jan. 14, 2015, at Joint Base Charleston, S.C. JB Charleston held an exercise Jan. 14 through 15 to test various security measures in the event of an on base disturbance. (U.S. Air Force photo/ Senior Airman Dennis Sloan)

A suspicious package was found at the Air Base fitness center during an exercise Jan. 14, 2015, at Joint Base Charleston, S.C. JB Charleston held an exercise Jan. 14 through 15 to test various security measures in the event of an on base disturbance. (U.S. Air Force photo/ Senior Airman Dennis Sloan)

Airmen from the 628th Civil Engineer Squadron remove barriers from in front of base headquarters during an exercise Jan. 14, 2015, at Joint Base Charleston, S.C. JB Charleston held an exercise Jan. 14 through 15 to test various security measures in the event of an on base disturbance. (U.S. Air Force photo/ Senior Airman Dennis Sloan)