The two helicopters of the U.S. Park Police played an important role after the September 11 attacks on the pentagon . The crews responded immediately , transporting injured personnel to hospitals . The helicopters served as a command and control platform , using their Forward Looking Infrared equipment to provide firefighters with intelligence about the scope and spread of the fire through the five rings of the structure , and taking over air traffic control for the Washington , D.C. airspace after the controllers at Washington National Airport had to evacuate due to thick smoke
September 11 attacks
September 11 attacks
United States Park Police