Members of the STS-107 crew get training on experiments in the Double Module one of the mission payloads.

At SPACEHAB in Cape Canaveral, Fla., members of the STS-107 crew get training on experiments in the Double Module, one of the mission payloads. Standing at left is Mission Specialist David Brown; kneeling in front are (left) Payload Specialist Ilan Ramon, from Israel, and Pilot William "Willie" McCool; Commander Rick Husband stands in the background. In the center is a trainer. A research mission, the mission will be the first flight of the Double Module and will also carry a Hitchhiker payload. The experiments range from material sciences to life sciences (many rats). The Hitchhiker carrier system is modular and expandable in accordance with payload requirements. Hitchhiker experiments are housed in canisters or attached to mounting plates. The Hitchhiker canister comes in two varieties--the Hitchhiker Motorized Door Canister and the Sealed Canisters