Following initial captive flight tests last year at NASA's Dryden Flight Research Center, Edwards Air Force Base, California, the X-34 technology demonstrator began a new series of tests last week in which it is being towed behind a semi-truck and released to coast on the Edwards dry lakebed.On July 20, 2000, it was towed and released twice at speeds of five and 10 miles per hour. On July 24, 2000, it was towed and released twice at 10 and 30 miles per hour. Twelve tests are planned during which the X-34 will be towed for distances up to 10,000 feet and released at speeds up to 80 miles per hour. The test series is expected to last at least six weeks.