USA-21Rocket launchby USALaunch time12 Feb 198706:40 UTCsuccessSerial number: 34B-51Final flight of Titan IIIB; Final use of Agena upper stage in any vehicle.MissionRocketPayloadsRocket TitanIII(34)Blaunched from Vandenberg AFB, SLC-4WUSAPayloadsNamePurposeMassCommentUSA-21 (SDS)---