NASA astronaut Robert Behnken, STS-130 Mission Specialist, participates in the mission's second session of extravehicular activity (EVA) as construction and maintenance continue on the International Space Station. During the 5-hour, 54-minute spacewalk, Behnken and Mission Specialist Nicholas Patrick (out of frame), connected two ammonia coolant loops, installed thermal covers around the ammonia hoses, outfitted the Earth-facing port on the Node-3 for the relocation of its Cupola, and installed handrails and a vent valve on the new module.