Unmanned military aircraft weighing less than 55 pounds like the RQ-11 Raven and RQ-21 Blackjack would gain more routine access to national airspace for training and defense support of civil authorities activities under draft regulations being proposed by the government. On Feb. 15, the Federal Aviation Administration released the long-awaited set of draft guidelines known as the Small Unmanned Aircraft Systems (SUAS) Rule . The agency had expected to release the draft rule in December pending a review by the...