STS110-375-032 (8-19 April 2002) --- Astronaut Carl E. Walz (lower left), Expedition Four flight engineer, plays host to some crewmates as he performs on a musical keyboard in the Destiny laboratory on the International Space Station (ISS). From the top, clockwise, are astronauts Rex J. Walheim, Jerry L. Ross, Ellen Ochoa, Lee M. E. Morin, all STS-110 mission specialists, and Stephen N. Frick, STS-110 pilot; along with astronaut Daniel W. Bursch (right foreground), Expedition Four flight engineer.