Members of various law enforcement agencies, including the U.S. Coast Guard, the Transportation Security Administration, and the Jacksonville, Fla., Aviation Authority, watch as role players and airport workers participate in an active shooter exercise at Jacksonville International Airport Wednesday, April 16, 2014. More than 30 Coast Guard members were invited to participate as role players for the exercise and wore civilian attire and carried baggage to help make the exercise as realistic as possible. (U.S. Coast Guard photo by Petty Officer 1st Class Lauren Jorgensen)