Unmanned Combat Air System Demonstrator program

The United States Navy Unmanned Combat Air System Demonstrator (UCAS-D) program included: Northrop Grumman X-47A Pegasus Northrop Grumman X-47B The UCAS-D program was created to demonstrate the feasibility of operating an unmanned aircraft from an aircraft carrier. Technology and operational procedures developed through the program and the X-47B demonstrator informed the design of a future operational carrier-based unmanned aircraft under the Unmanned Carrier-Launched Surveillance and Strike (UCLASS) program.

Source: Wikipedia — Unmanned Combat Air System Demonstrator program (CC BY-SA 4.0)