Here is a picture of the crew of STS-90 with their Payload Specialist Alternates. Back Row(Left to Right): Payload Specialist James Pawelczyk; Mission Specialists Richard Linnehan, Kathryn Hire, and Dave Williams; Payload Specialist Jay Buckey. Front row: Alternate Payload Specialist Alexander Dunlap; Pilot Scott Altman; Commander Richard Searfoss; and Alternate Payload Specialist Chiaki Mukai.