View of the Payload Flight Test Article (PFTA) installed in cargo bay

View of the Payload Flight Test Article (PFTA) installed into Challenger's cargo bay in the Payload Changeout Room at Pad 39A at the Kennedy Space Center (KSC). The American flag is visible on one side of the PFTA in the cargo bay. The Kennedy Space Center alternative photo number is KSC-108-83PC-566.