Eighth Atlantis flight. An unplanned EVA took place to help with the deployment of GRO's high gain antenna. Also demonstrated were mobility aids which will be used on Space Station Freedom. Landed at Edwards Air Force Base, CA. on April 11, 1991. Mission Duration: 143 hours 22 minutes 45 seconds.

Launch Date: April 5, 1991 Launch Vehicle: Atlantis Crew: Commander: Steven R. Nagel, Pilot:Kenneth D. Cameron, Mission Specialists: Linda M. Godwin, Jerome Apt, Jerry L. Ross.