CNET:
Earlier this month, Northrop Grumman’s X-47B unmanned
aircraft made its second and third test flights at Edwards Air
Force Base in California. The X-47B, designated UCAS for
unmanned combat air system, is a prototype going through its
fledgling stage en route to the goal of demonstrating in 2013
that an unmanned, tailless, strike fighter-size aircraft can
land on and take off from an aircraft carrier, according to
Jonathan Skillings, writing for CNET News. Under contract with
the US Navy, Northrop Grumman is also building a second,
similar aircraft, which will include aerial refueling
equipment.
