Jim Voss and Susan Helms plant a cherry laurel tree outside the KSC Headquarters building to commemorate aboard the International Space Station.

Astronauts Jim Voss (left) and Susan Helms plant a cherry laurel tree outside the KSC Headquarters building to commemorate their stay as Expedition 2 crew members aboard the International Space Station. Expedition 2, which also included cosmonaut Yury Usachev, made the space voyage to the Station on mission STS-102 in March 2001. After five months on the Station, they returned to Earth, at the KSC Shuttle Landing Facility, on mission STS-105 in August 2001