In the Operations and Checkout Building, the Joint Airlock Module is carried across the Operations and Checkout Building toward a stand on the floor. The module will be moved to a horizontal position and placed in the payload canister at left. Then it will be taken to the Space Station Processing Facility where it will continue to undergo preflight processing for the STS-104 mission scheduled for launch aboard Space Shuttle Atlantis May 17, 2001. The Joint Airlock Module is the gateway from which crew members aboard the International Space Station will enter and exit the 470-ton orbiting research facility