7 April 2010 --- For the first time, four women were in space.

7 April 2010 --- The four women currently on the International Space Station pose for a photo in the Zvezda Service Module while space shuttle Discovery remains docked with the station. From the left are NASA astronaut Dorothy Metcalf-Lindenburger and Japan Aerospace Exploration Agency (JAXA) astronaut Naoko Yamazaki, both STS-131 mission specialists; along with NASA astronauts Tracy Caldwell Dyson, Expedition 23 flight engineer; and Stephanie Wilson, STS-131 mission specialist.