Expedition 5 astronaut Peggy Whitson smiles as she dons her launch for the liftoff of Space Shuttle Endeavour at 7:44 p.m. EDT.

Expedition 5 astronaut Peggy Whitson smiles as she dons her launch and entry suit for the scheduled liftoff of Space Shuttle Endeavour at 7:44 p.m. EDT. This is her first Shuttle flight. Expedition 5 is traveling on mission STS-111 to the International Space Station to replace the current resident crew, Expedition 4. STS-111 is the second Utilization Flight to the International Space Station, carrying the Multi-Purpose Logistics Module Leonardo, the Mobile Base System (MBS), and a replacement wrist/roll joint for the Canadarm 2. The MBS will be installed on the Mobile Transporter to complete the Canadian Mobile Servicing System, or MSS. Expedition 4 crew members will return to Earth with the STS-111 crew on Endeavour.