NASA - National Aeronautics and Space Administration

ISS023-E-021868 (12 April 2010) --- Expedition 23 crew members pose for a in-flight crew portrait in the Destiny laboratory of the International Space Station while space shuttle Discovery (STS-131) remains docked with the station. Russian cosmonaut Oleg Kotov, commander, is at center. Also pictured clockwise (from bottom center) are Russian cosmonaut Alexander Skvortsov, NASA astronauts Tracy Caldwell Dyson and T.J. Creamer, Russian cosmonaut Mikhail Kornienko and Japan Aerospace Exploration Agency (JAXA) astronaut Soichi Noguchi, all flight engineers.

ISS023-E-021869 (12 April 2010) --- Expedition 23 crew members pose for a in-flight crew portrait in the Destiny laboratory of the International Space Station while space shuttle Discovery (STS-131) remains docked with the station. Russian cosmonaut Oleg Kotov, commander, is at center. Also pictured clockwise (from bottom center) are Russian cosmonaut Alexander Skvortsov, NASA astronauts Tracy Caldwell Dyson and T.J. Creamer, Russian cosmonaut Mikhail Kornienko and Japan Aerospace Exploration Agency (JAXA) astronaut Soichi Noguchi, all flight engineers.

S131-E-009225 (12 April 2010) --- Japan Aerospace Exploration Agency (JAXA) astronauts Naoko Yamazaki (left), STS-131 mission specialist; and Soichi Noguchi, Expedition 23 flight engineer, pose for a photo near a window in the Kibo laboratory of the International Space Station while space shuttle Discovery remains docked with the station.

S131-E-009227 (12 April 2010) --- Japan Aerospace Exploration Agency (JAXA) astronauts Naoko Yamazaki (left), STS-131 mission specialist; and Soichi Noguchi, Expedition 23 flight engineer; along with NASA astronaut James P. Dutton Jr. (bottom), STS-131 pilot, pose for a photo near a window in the Kibo laboratory of the International Space Station while space shuttle Discovery remains docked with the station.

S131-E-009229 (12 April 2010) --- NASA astronauts Alan Poindexter (bottom right) and James P. Dutton Jr. (bottom left), STS-131 commander and pilot, respectively; along with Japan Aerospace Exploration Agency (JAXA) astronauts Naoko Yamazaki (upper left), STS-131 mission specialist; and Soichi Noguchi, Expedition 23 flight engineer, pose for a photo near a window in the Kibo laboratory of the International Space Station while space shuttle Discovery remains docked with the station.

S131-E-009231 (12 April 2010) --- NASA astronauts Alan Poindexter (right) and James P. Dutton Jr., STS-131 commander and pilot, respectively; along with Japan Aerospace Exploration Agency (JAXA) astronaut Naoko Yamazaki, mission specialist, pose for a photo in the Kibo laboratory of the International Space Station while space shuttle Discovery remains docked with the station.

S131-E-009234 (12 April 2010) --- Russian cosmonaut Alexander Skvortsov, Expedition 23 flight engineer, equipped with a bungee harness, exercises on the Combined Operational Load Bearing External Resistance Treadmill (COLBERT) in the Harmony node of the International Space Station while space shuttle Discovery remains docked with the station.

S131-E-009235 (12 April 2010) --- Russian cosmonaut Alexander Skvortsov, Expedition 23 flight engineer, equipped with a bungee harness, exercises on the Combined Operational Load Bearing External Resistance Treadmill (COLBERT) in the Harmony node of the International Space Station while space shuttle Discovery remains docked with the station.

S131-E-009244 (12 April 2010) --- NASA astronaut Alan Poindexter, STS-131 commander, is pictured near the windows in the Cupola of the International Space Station while space shuttle Discovery remains docked with the station.

S131-E-009277 (12 April 2010) --- NASA astronaut Clayton Anderson, STS-131 mission specialist, watches a water bubble float freely between him and the camera, showing his image refracted, on the middeck of space shuttle Discovery while docked with the International Space Station.