August 30, 1984 - OV-103 Discovery makes her maiden flight on STS-41D, and the 12th flight of the Space Shuttle program.
Construction on Discovery was completed by Rockwell International in October 1983 from Palmdale, California. Like her sisters, Discovery was named for ocean going research and exploration vessels of the same name - this is reflected in the crew insignia for STS-41D with the depiction of a sailing vessel. Her first mission, STS-41D, included the deployment of various commercial satellites into orbit, as well as several scientific experiments over the 6 day mission, before landing at Edwards AFB in California.
After 39 missions, more than any other orbiter, Discovery was decommissioned in 2011 and currently resides in the Steven F. Udvar-Hazy Center.