Operations and Checkout Building

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Operations and Checkout Building
The Operations and Checkout Building (previously known as the Manned Spacecraft Operations Building) is a historic site on Merritt Island, Florida, United States. The five-story structure is in the Industrial Area of NASA's Kennedy Space Center. Its facilities include the crew quarters for astronauts prior to their flights. On January 21, 2000, it was added to the U.S. National Register of Historic Places.

History
When it was originally built to process spacecraft in the Apollo era, it was known as the Manned Spacecraft Operations Building. It was renamed the Operations and Checkout Building during the Apollo program, known informally as the O&C. During the 1980s and 90s it was used to house and test Spacelab science modules before their flights aboard the Space Shuttle. In the 2000s, trusses for the International Space Station were checked out in the building. On January 30, 2007, NASA held a ceremony to mark the transition of the building's high bay for use by the Constellation program. The building would serve as the final assembly facility for the Orion crew exploration vehicle. In preparation for the transition, the state of Florida provided funds to clear the facility of about 50 short tons (45 t) of steel stands, structures and equipment.