Photographic documentation showing STS-98 crewmembers engaging in preflight training in bldg. 5. Views include: STS-98 mission commander Kenneth D. Cockrell, wearing a Launch Entry Suit (LES) and a helmet, sits in the commanders station on the flight deck of the mobile-based Shuttle Mission Simulator (SMS) (04774); STS-98 pilot Mark L. Polansky, wearing LES and helmet, sits in the pilots station, with STS-98 Mission Specialist (MS) Robert L. Curbeam seated behind him on the flight deck (04775); Polansky in the pilots station (04776); Curbeam in a LES and wearing a Communications Carrier Assembly (CCA) (04777); Polansky and Curbeam pose, wearing LES and no helmets, in bldg. 5 (04778); Polansky, wearing a LES, fastens his CCA (04779); Cockrell, Polansky, Curbeam and STS-98 MS Marsha S. Ivins, wearing LES, sit in locker room (04780); Ivins and suit techs (04781); suit techs and Polansky (04782); suit techs and Cockrell (04783).