sentences:  Airships have been used not only as advertising and promotional vehicles and for the carriage of passengers, but also as television camera platforms, broadcast relay stations and as surveillance vehicles from which various sensors can be operated.AMS has developed these applications with numerous clients, including Westinghouse, Northrop Grumman, the U.S. Navy, Defense Advance Research Projects Agency (DARPA), the U.S. Army, the British Ministry of Defence, the NYPD’s Counter Terrorism Division (for security surveillance), and Woods Hole Oceanographic Institution (WHOI) for environmental surveys.During the 2008 GOP Presidential Primary, AMS operated the Ron Paul Blimp.