Northrop Grumman's RQ-4 Global Hawk unmanned aircraft system (UAS) made aviation history Feb. 2 when it successfully completed its first roundtrip flight from the company's Palmdale, Calif., manufacturing facility. AF-20, a Block 30 Global Hawk built for the U.S. Air Force, performed the historic mission, soaring at altitudes of 58,300 feet for approximately four hours and 18 minutes. "This was the first time ever that the same Global Hawk has taken off and landed in a single mission from Palmdale, heralding a new era of flights in and out of the facility," said George Guerra, Northrop Grumman vice president of...