(10/31/2001) -- EXPEDITION FOUR CREW PORTRAIT -- Expedition Four crew members take a break from training for their scheduled upcoming stay aboard the International Space Station (ISS) to pose for the traditional pre-flight crew portrait. Cosmonaut Yuri I. Onufrienko (standing at center), mission commander, is flanked by astronauts Daniel W. Bursch (left) and Carl E. Walz, both flight engineers. The national flags of the International Partners are at the bottom of the portrait