The events of 9/11 as they unfolded through actual audio.
ACTUV Speed and Maneuverability Tests
DARPA’s Anti-Submarine Warfare (ASW) Continuous Trail Unmanned Vessel (ACTUV) program has designed, developed and constructed an entirely new class of ocean-going vessel—one intended to traverse thousands of kilometers over the open seas for months at a time, all without a single crew member aboard. The ACTUV technology demonstration vessel was recently transferred to water at its construction site in Portland, Ore., and conducted speed tests in which it reached a top speed of 27 knots (31 mph/50 kph). The vessel is scheduled to be christened on April 7, 2016, with open-water testing planned to begin in summer 2016 off the California coast.