Astronaut Dave Wolf assists astronaut Tom Marshburn with his extravehicular mobility unit spacesuit in the joint airlock.

Astronaut Dave Wolf assists astronaut Tom Marshburn with his extravehicular mobility unit spacesuit in the joint airlock, while astronaut Christopher Cassidy stands suited and almost ready at right. The two were about to participate in the July 24 flight day 10 spacewalk, and they are scheduled to wrap up the EVA work with a fifth overall session on July 27. The three mission specialists are part of a 13-member aggregation of astronauts and cosmonauts currently onboard the orbital outpost while its crew of six plays host to Endeavour's crew of seven.