LANCASTER - Aircraft flying without pilots in the cockpits may be the future of aviation, but before such vehicles can become commonplace they must be able to operate safely, routinely and reliably in the existing national airspace system. To that end, NASA is teaming up with the aerospace industry, the Defense Department and the Federal Aviation Administration to establish the policies, procedures and supporting technology necessary to safely integrate unmanned aircraft with existing air traffic. The project, called HALE ROA in the NAS - for high-altitude, long-endurance remotely operated aircraft in the national airspace system - kicked off this week...