George Becker leads a SWAT team through an office building in a training exercise Tuesday morning at Fort Jackson in Columbia, S.C. The active scenario involved two gunmen and dozens killed or injured with Richland County S.W.AT responding to neutralize the threats at the 81st Regional Support Command. Tuesday's drill made use of hundreds of participants from the Army, local hospitals, and agencies from the City of Columbia, Richland and Lexington counties. 4/7/15