Aboard the high-flying International Space Station, the Expedition 23 crew began a new week Monday with preparations for the imminent arrival of three additional crew members and the space shuttle Discovery, as well as the regular duties of orbital life.

The three-member Expedition 23 crew will expand to six on April 4 when Flight Engineers Alexander Skvortsov, Tracy Caldwell Dyson and Mikhail Kornienko dock to the International Space Station in the Soyuz TMA-18 spacecraft.

Discovery's STS-131 mission begins with the shuttle's scheduled launch on April 5 from the Kennedy Space Center in Florida. Discovery will deliver a multi-purpose logistics module, or MPLM, filled with science racks to be transferred to laboratories on the station. The shuttle is slated to dock with the station on April 7.