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Results of the comparative studies would contribute to NASA s research on ways to effectively use man in space. Although no officially approved project for an orbital laboratory existed at the time, research within the agency over the past several years had developed considerable technology applicable to multimanned vehicles and had fostered much interest in such a project. Langley's MORL, concept envisioned a four-man Workshop with periodic crew change and resupply, with at least one crew performing a year-long mission to evaluate the effect of weightlessness during long-duration space flights.