She was a mission specialist on STS-56 (1993), was payload commander on STS-66, and was mission specialist and flight engineer on STS-96 and STS-110 (2002).
Совершила четыре космических полёта на шаттлах: STS-56 (1993, «Дискавери»), STS-66 (1994, «Атлантис»), STS-96 (1999, «Дискавери») и STS-110 (2002, «Атлантис»), инженер.