ULA Halts Delta Rocket Production at Assembly Line.

United Launch Alliance (ULA) has closed its Delta rocket assembly line in Alabama, after the 389th and last Delta rocket rolled out of the factory for the journey to its launch base in Florida, clearing real estate in ULA’s sprawling manufacturing center for the next-generation Vulcan launch vehicle. ULA, a 50-50 joint venture between Boeing and Lockheed Martin, is retiring the Delta family of rockets in favor of the new-generation Vulcan launch vehicle, which is scheduled to make its first test flight later this year from Cape Canaveral.