Discovery astronauts accomplish 1st spacewalkOur Web Bureau / Houston December 13, 2006Construction of the International Space Station is one step closer to completion with the addition of the P5 integrated truss structure during Tuesday's spacewalk by STS-116 mission specialists Bob Curbeam and Christer Fuglesang, according to a report on the NASA website.The spacewalk began at 1531 hrs (EST) and concluded at 2207 hrs. The P5 was attached to the P4 segment at 1745 hrs. Mission specialist Joan Higginbotham used the station's robotic arm to move the new segment with only inches of clearance into its installation position. Then, the spacewalkers guided Higginbotham with visual cues as the exacting operation was carried out. After the P5
