X-47B, drone, Northrop Grumman, UCAS-D, Pegasus, US Army, flight, U.S. Air Force,

 
X-47B Drone Northrop Grumman UCAS-D Pegasus US Army Flight U.S. Air Force
 
X-47B,drone,Northrop Grumman,UCAS-D,Pegasus,US Army,flight,U.S. Air Force