Northrop Grumman X-47B:

Is an American demonstration unmanned combat air vehicle (UCAV) manufactured by Northrop Grumman, this aircraft developed from X-47A Pegasus and this project began as part of DARPA's J-UCAS program, and is now part of the US Navy's UCAS-D (Unmanned Combat Air System Demonstration) program.

 

Northrop Grumman RQ-4 Global Hawk:

Is an unmanned aerial vehicle (UAV) manufactured by Northrop Grumman, this program cost 1.635 billion $, used by the United States Air Force and Navy and the German Air Force as a surveillance aircraft, and generally this plane used as a spy plane.