Lockheed Martin press release: "AKRON, Ohio, July 27th, 2011 -- The U.S. Army and Lockheed Martin launched the first-of-its kind High Altitude Long Endurance-Demonstrator this morning, demonstrating a number of key technologies critical to development of unmanned airships... The airship reached an altitude of approximately 32,000 feet, however, a technical anomaly prevented the airship from attaining its target altitude of 60,000 feet and the HALE-D team decided to terminate the flight."