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Payload specialist Fred W. Leslie makes use of the versatile U.S. Microgravity Laboratory (USML-2) glovebox to conduct an investigation with the Oscillatory Thermocapillary Flow Experiment (OTFE). This complement of the Surface-Tension-Driven Convection Experiment (STDCE) studies the shapes that fluid surfaces in weightless environments assume within specific containers. Leslie was one of two guest researchers who joined five NASA astronauts for 16 days of on Earth-orbit research in support of USML-2.