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STS-77 was the 77th Space Shuttle mission and the 11th mission of the Space Shuttle Endeavour. It was devoted to opening the commercial space frontier. Endeavour carried the commercially owned and operated SPACEHAB module, designed specifically to be nestled inside the cargo bay of Space Shuttles. Endeavour also deployed the Inflatable Antenna Experiment which laid the groundwork for future technological developments in inflatable space structures.