Stock Photo - 16 April 2002 --- Astronaut Jerry L Ross, STS-110 mission specialist, anchored to the mobile foot restraint at the end of the International Space Station’s ISS Canadarm2, works in tandem with astronaut Lee M E Morin out of frame, mission specialist, during the fourth and final scheduled session of extravehicular activity EVA for the STS-110 mission The major task was the installation of a beam, which is called the Airlock Spur, between the Quest Airlock and the S0 S-zero Truss The spur will be used by spacewalkers in the future as a path from the airlock to the truss Ross and Morin also installed handrails onto the S0, partially assembled a platform, installed two floodlights and performed several other tasks preparing for upcoming assembly missions