MUSCATATUCK URBAN TRAINING CENTER, Ind. " Mike "Caveman" Spina speaks with Sonja Latshaw about role players during Vibrant Response 13. During the exercise, the role players portray "displaced civilians" in the aftermath of a "simulated" nuclear attack on a major Midwestern city. Spina, who has worked as a role player for military exercises around the United States for the past six years, is one of the team leaders for the civilian role players during the exercise. Latshaw is the wife of the vice president of Lexicon Consulting Inc. Vibrant Response 13 is a major incident exercise conducted by U.S. Northern Command and led by U.S. Army North.