Astronaut Sunita L. Williams, Expedition 14 flight engineer, used a pistol grip tool as she worked on the International Space Station in the first of three spacewalks slated to occur over a nine-day period. During the 7-hour 55-minute spacewalk that took place on Jan. 31, 2007, Williams and station commander Michael E. Lopez-Alegria (out of frame) reconfigured one of two cooling loops for the Destiny laboratory module, rearranged electrical connections and secured the starboard radiator of the P6 truss after retraction.