Wolf on Endeavour with hardware

S89-E-5274 (26 Jan 1998) --- This Electronic Still Camera (ESC) image shows astronaut David A. Wolf, mission specialist and cosmonaut guest researcher, holding a pen light in his teeth to get better lighting in this piece of equipment, he is working on onboard the Space Shuttle Endeavour. Wolf is being replaced by astronaut Andrew S. W. Thomas as the cosmonaut guest researcher onboard Russia's Mir Space Station. Thomas will be the last American astronaut to serve onboard the Mir. This ESC view was taken on January 26, 1998, at 14:28:06 GMT.