Astronauts Brent W. Jett, Jr. (left) and William M. Shepherd participate in an old Navy tradition of ringing a bell to announce the arrival or departure of someone to a ship. The bell is mounted on the wall in the Unity node of the ISS. The bell-ringing took place shortly after an in-space reunion on STS-97 Flight Day 9. Photo taken December 8, 2000. 

Courtesy of NASA  Photo 20 of 32 in Space Living: Astro Home