7 April 2010 --- Russian cosmonaut Oleg Kotov (far left), Expedition 23 commander, prepares to greet the STS-131 crew as it comes aboard the International Space Station

7 April 2010 --- Russian cosmonaut Oleg Kotov (far left), Expedition 23 commander, prepares to greet the STS-131 crew as it comes aboard the International Space Station to spend several days in a number of busy joint activities for the two crews. Seen clearly in the hatch are astronaut Alan Poindexter, STS-131 commander, and Japan Aerospace Agency astronaut Naoko Yamazaki, mission specialist.