The Defense Department would like to field a string of passive radars in remote locations well north of the Arctic Circle as part of an effort -- details of which were previously classified -- to extend the sensor reach of North American Aerospace Defense Command and U.S. Northern Command to feed alerts as well as actionable information to U.S. and Canadian military leaders. Talon Archer, developed and deployed using commercial-off-the-shelf technology as a prototype in 2017 through the Office of...