English: At Launch Pad 39A at NASA's Kennedy Space Center in Florida, the STS-131 crew members pose for a group portrait following a question-and-answer session with media representatives. From left are Commander Alan Poindexter; Pilot James P. Dutton Jr.; and Mission Specialists Rick Mastracchio, Dorothy Metcalf-Lindenburger, Stephanie Wilson, Naoko Yamazaki of the Japan Aerospace Exploration Agency, and Clayton Anderson. Space shuttle Discovery awaits liftoff in the background. The crew members of space shuttle Discovery's STS-131 mission are at Kennedy for training related to their launch dress rehearsal, the Terminal Countdown Demonstration Test. The seven-member crew will deliver the multi-purpose logistics module Leonardo, filled with resupply stowage platforms and racks, to the International Space Station aboard Discovery. Targeted for launch on April 5, STS-131 will be the 33rd shuttle mission to the station and the 131st shuttle mission overall