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STS-81 Mission Specialist Jerry Linenger waves to the camera in his launch/entry suit and helmet in the suitup room of the Operations and Checkout (O&C) Building. He is on his second Shuttle flight and has been an astronaut since 1992. Linenger will become a member of the Mir 22 crew and replace astronaut John Blaha on the Russian space station for a four-month stay after the Space Shuttle orbiter Atlantis docks with the orbital habitat on flight day 3. A medical doctor and an exercise buff, Linenger will conduct physiological experiments during his stay on Mir. He and five crew members will shortly depart the O&C and head for Launch Pad 39B, where the Space Shuttle Atlantis will lift off during a 7-minute window that opens at 4:27 a.m. EST, January 12