Lucid holds the United States single-mission spaceflight endurance record on the Russian Space Station Mir. Following a year of training in Star City, Russia, her journey started with liftoff at KSC on March 22, 1996, aboard STS-76 Atlantis. Following docking, she transferred to the Mir Space Station. Assigned as a board engineer 2, she performed numerous life science and physical science experiments during the course of her stay aboard Mir. Her return journey to KSC was made aboard STS-79 Atlantis on September 26, 1996. In completing this mission, Lucid traveled 75.2 million miles in 188 days, 4 hours, 0 minutes and 14 seconds.