In addition to posing with tourists, another primary duty for members of Joint Task Force Empire Shield is to prevent terrorists attacks in popular destinations like Grand Central Station. (Photo: U.S. Air Force photo/Tech. Sgt. Bennie J. Davis III)

In addition to posing with tourists, another primary duty for members of Joint Task Force Empire Shield is to prevent terrorists attacks in popular destinations like Grand Central Station. (Photo: U.S. Air Force photo/Tech. Sgt. Bennie J. Davis III)