Next summer is the soonest the Army could test an initial Dark Eagle unit with a full complement of missiles, assuming the service -- and Lockheed Martin, maker of the new two-stage missile and bespoke launcher -- can successfully demonstrate an end-to-end flight of the Long Range Hypersonic Weapon. Congressional auditors have provided lawmakers that update on the U.S. military's premier long-range hypersonic strike weapon -- which for the last seven months has conducted remedial work to address problems with...