United States Microgravity Laboratory - 2 (USML-2). STS-73 marked second flight of U.S. Microgravity Laboratory (USML) and built on foundation of its predecessor, which flew on Columbia during Mission STS-50 in 1992.
The patch is made by AB Emblems, the NASA Contractor for mission emblems. This 4 inch diameter embroidered patch was the emblem of Space Shuttle Mission STS-73.
