EVA 25

ISS038-E-020354 (24 Dec. 2013) --- NASA astronaut Rick Mastracchio, Expedition 38 flight engineer, participates in the second of two spacewalks, spread over a four-day period, which were designed to allow the crew to change out a faulty water pump on the exterior of the Earth orbiting International Space Station. He was joined on both spacewalks by NASA astronaut Mike Hopkins.