Team Vandenberg launched a United Launch Alliance Delta IV Medium+ (5,2) from Space Launch Complex-6 here at 4:12 p.m. PDT Tuesday, April 3, 2012. The launch was the Department of Defense’s first-ever Delta IV Medium launch vehicle configured with a 5-meter payload fairing and two solid rocket motors. (U.S. Air Force photo/Rodney Jones). Image: Vandenberg Air Force Base website The Delta IV is an expendable launch system and primarily designed to satisfy the needs of the U.S. military. It is built by Boeing, operated by United Launch Alliance for commercial launches, military missions as well as NASA Flights.