9/25/2012 - Brian Noack, Homeland Security Investigations special agent, provides security outside of a simulated residence, during the Rapid Response Team Field Familiarization and Disaster Response Training exercise Sept. 20, 2012, at Nellis Air Force Base, Nev. HSI special agents chose Nellis AFB for the training location due to prior good training experiences on the installation. (U.S. Air Force photo by Staff Sgt. Christopher Hubenthal)

9/25/2012 - Austin Berrier and George Happ, Homeland Security Investigations special agents, provide medical care to a simulated casualty during the Rapid Response Team Field Familiarization and Disaster Response Training exercise Sept. 20, 2012, at Nellis Air Force Base, Nev. HSI special agents chose Nellis AFB for the training location because of its ideal facilities, equipment, and military support, as well as its challenging terrain and climate. (U.S. Air Force photo by Staff Sgt. Christopher Hubenthal)

9/25/2012 - Marcus Custer, Homeland Security Investigations special agent, instructs other HSI special agents, during the Rapid Response Team Field Familiarization and Disaster Response Training exercise Sept. 20, 2012, at Nellis Air Force Base, Nev. HSI special agents chose Nellis AFB for the training location because of its ideal facilities, equipment, and military support, as well as its challenging terrain and climate. (U.S. Air Force photo by Staff Sgt. Christopher Hubenthal)