NASA astronauts Bill Shepherd and Marsha Ivins aboard the space station

ISS01-E-5368 (14 February 2001) --- Onboard the new Destiny laboratory, Expedition One commander William M. (Bill) Shepherd, shares a brief break from a busy work agenda with astronaut Marsha S. Ivins, STS-98 mission specialist. The two are alumni of the tenth class of NASA astronaut candidates, having come aboard with 15 other trainees in the summer of 1984.