The Navy and Northrop Grumman [NOC] conducted the fourth flight test of the MQ-4C Triton unmanned aerial vehicle on Wednesday, reaching half the number of tests planned for the early stages of the program inn Palmdale, Calif. The Navy's Triton. Photo by Northrop Grumman. The Tritons, a variant of the Air Force's Global Hawk, eventually will be deployed to provide high-altitude long-endurance maritime intelligence, reconnaissance and surveillance missions. A Northrop Grumman official confirmed the fourth fight test was taking place…