(04/24/2000) --- Waving to onlookers, the STS-101 crew eagerly walk to the waiting Astrovan that will take them to Launch Pad 39A and liftoff of Space Shuttle Atlantis, targeted for 4:15 p.m. EDT. In their orange launch and entry suits, they are (in the f ront, left to right) Mission Specialists Susan Helms, Yuri Usachev of Russia and Mary Ellen Weber, plus Pilot Scott J. Horowitz; (in the rear, left to right) Mission Specialists James S. Voss and Jeffrey N. Williams, plus Commander James D. Halsell Jr. The mission will take the crew to the International Space Station to deliver logistics and supplies and to prepare the Station for the arrival of the Zvezda Service Module, expected to be launched by Russia in July 2000. Also, the crew will conduct one space walk. This will be the third assembly flight to the Space Station. The mission is expected to last about 10 days, with Atlantis landing at KSC Thursday, May 4, about 11:23 a.m. EDT