Delta is completing its mission as ULA transitions to the new Vulcan rocket that incorporates some of the best attributes of both Delta and the Atlas fleets to continue assured access to space for the next era. Launch of the Delta IV Heavy rocket carrying the NROL-70 national security mission is planned for March 28 at 1:40 p.m. EDT (1740 UTC) from Space Launch Complex (SLC)-37 at Cape Canaveral Space Force Station, Florida.