U.S. Air Force orders more RQ-4 Global Hawks
September 15, 2014 at 17:08 PM EDT
Richard Tomkins SAN DIEGO, Sept. 15 (UPI) -- The U.S. Air Force ordered 3 more RQ-4 Global Hawk unmanned aircraft systems from Northrop Grumman for $354 million to expand its fleet of surveillance drones.
