MELBOURNE, Australia – Feb. 22, 2015 – A Northrop Grumman Corporation (NYSE:NOC) RQ-4 Global Hawk unmanned aircraft system (UAS) landed Feb. 21 at the Avalon Airport in Australia for display at the Australian International Air Show. The system's ability to conduct high-altitude surveillance missions for greater than 30 hours is ideally suited for the vast Asia-Pacific region. - See more at:… (globenewswire.com) 更多...