A U.S. Park Police Skytower overlooks the National Mall after the 57th Presidential Inauguration Swearing-In Ceremony. The Skytower is equipped with high tech security cameras and used to help crowd control with the Secret Service, U.S. Capitol Police and the National Guard. (Official U.S. Air Force photo by Tech. Sgt. Eric Miller/ New York Air National Guard)
Tech. Sgt. Eric Miller
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