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Astronaut Takao Doi works with a 156-pound crane to manipulate a piece of simulated hardware carried onboard this trip of the Space Shuttle Columbia as part of a continuing preparation effort for future work on the International Space Station (ISS). The ongoing project allows for evaluation of tools and operating methods to be applied to the construction of the ISS. This crane device is designed to aid future Extravehicular Activity (EVA) in transporting Orbital Replacement Units (ORU) with a mass up to 600 pounds from translating carts on the exterior of ISS to various worksites on the truss structure. Earlier Doi, an international mission specialist, and astronaut Winston E. Scott had installed the crane in a socket along the middle port side of Columbia's cargo bay for the evaluation. The two began the crane operations, long ago manifest for this mission, after completing a contingency EVA to snag the free-flying Spartan 201 (out of view here) and berth it in the payload bay. This photo was taken with an Electronic Still Camera (ESC) at 05:15:06 GMT.