Workers replace a panel on hardware in the Space Station Processing Facility checking the fit of a Power Data Grapple Fixture PDGF.

Workers replace a panel on hardware in the Space Station Processing Facility, checking the fit of a Power Data Grapple Fixture (PDGF). The PDGF is part of the payload on mission STS-98, a flight to the International Space Station. During the mission, the crew will install the U.S. Lab in the Space Station during a series of three space walks. The STS-98 mission will provide the station with science research facilities and expand its power, life support and control capabilities