Expedition Three Commander Frank Culbertson shows his eagerness for liftoff while suiting up in his launch and entry suit.

Expedition Three Commander Frank Culbertson shows his eagerness for liftoff while suiting up in his launch and entry suit. On mission STS-105, Discovery will be transporting the Expedition Three crew and several scientific experiments and payloads to the International Space Station, including the Early Ammonia Servicer (EAS) tank. The EAS, which will support the thermal control subsystems until a permanent system is activated, will be attached to the Station during two spacewalks. The three-member Expedition Two crew will be returning to Earth aboard Discovery after a five-month stay on the Station. Launch is scheduled for 5:38 p.m. EDT Aug. 9