Second UCAS at Pax River

The second X-47B, known as Air Vehicle (AV) 2, arrives at Naval Air Station Patuxent River, Md., June 14 after its cross-country drive from Edwards Air Force Base, Calif. AV-2 is identical to its sister aircraft, which arrived at Pax on Dec. 20, except it incorporates the hardware required to perform autonomous aerial refueling (AAR), a technology the UCAS-D team has been developing to fuel unmanned aircraft in flight. (U.S. Navy photo by Steven Kays)