Astronaut Thomas D. Akers, in the Spacehab, goes over an inventory of supplies which will be transferred to the Mir Space Station. Onboard for the launch were astronauts William F. Readdy, commander; Terrence W. Wilcutt, pilot; John E. Blaha, Jerome (Jay) Apt, Akers and Carl E. Walz, all mission specialists. On flight day 4, the crew docked with the Mir Space Station. Shannon W. Lucid, who had spent six months aboard Mir, switched cosmonaut guest researcher roles with Blaha. The latter joined fellow Mir-22 crew members Valeri G. Korzun, commander, and Aleksandr Y. Kaleri, flight engineer.