Expedition Five Commander Valery Korzun and Flight Engineers Peggy Whitson and Sergei Treschev spent their first full day alone on the International Space Station today. There are no timelined activities. The crew will enjoy light duty and will continue to settle into their new home. The Expedition Five crew arrived at the station June 7 on Space Shuttle Endeavour and is beginning a tour of duty that is scheduled to last until mid-October. Endeavour undocked from the station Saturday, and its crew, which includes Expedition Four, performed landing preparations Sunday. Endeavour is slated to touch down at 11:59 a.m. CDT (1659 GMT) Monday at Kennedy Space Center, Fla. Busy Stay on Tap for Expedition Five Expedition Five Commander Valery Korzun and Flight Engineers Peggy Whitson and Sergei Treschev are scheduled to have a busy tour of duty onboard the International Space Station. Four spacecraft -- two shuttles and two Russian Progress cargo ships -- are slated to visit the station, and two Expedition Five spacewalks are on tap. The first shuttle flight is STS-112, which will deliver the S1 Truss to the station in August. Then, STS-113 is scheduled to deliver the P1 Truss and the Expedition Six crew to the orbital outpost in mid-October. Science operations will continue during Expedition Five's stay. There will be a total of 24 new and continuing science investigations -- 10 human life sciences studies, six in microgravity, five in space product development and three sponsored by the Office of Space Flight.