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 WSTF operates as an organizational element of the Johnson Space Center. Facilities at WSTF include spacecraft propulsion system test facilities and materials test laboratories. Established in 1963, the facility actively supported the Apollo, Skylab, Viking and other NASA programs. WSTF presently performs development, evaluation and qualification testing of Space Shuttle propulsion systems, materials and components. Materials testing in support of the Space Station Freedom Program was initiated in 1989, and propulsion testing will begin in 1991.