The Navy's X-47B completes the first-ever aircraft carrier landing of an unmanned drone on the USS George H.W. Bush. Video by WSJ's Julian E. Barnes via #WorldStream.

The X-47B, an unmanned combat vehicle built as a demonstration aircraft for the U.S. Navy, had its inaugural flight at California's Edwards Air Force Base on February 4, 2011.

The Navy's X-47B unmanned fighter has hit yet another milestone, successfully refueling in mid-air over the waters off Maryland and Virginia. With every milestone, the X-47B seems just a little ...

A year later, the Unmanned Combat Air System demonstration project ended. The X-47B was just a demonstration, a proof of concept. However, the project led to the Carrier-Based Aerial Refueling ...