Detective Damon Sullivan, from the Leon County Sheriff's Office, and others interview the key witnesses at the scene of the blast as a storm cloud rolls across Eglin Air Force Base's range, Sept. 28. The interviews were part of the FBI's large vehicle post blast school attended by state and local law enforcement agencies as well as Navy and Air Force explosive ordnance disposal technicians. Three vehicles were blown up to create the crime scenes that students would investigate. The week-long course was the second held on Eglin with 67 students representing 18 different U.S. agencies.