Astronaut Daniel Tani of NASA mission STS-120 participates in the second of five scheduled sessions of extravehicular activity (EVA) as construction continues on the International Space Station on October 28, 2007. During the 6-hour, 33-minute spacewalk Tani and astronaut Scott Parazynski worked in tandem to disconnect cables from the P6 truss, allowing it to be removed from the Z1 truss. Tani also visually inspected the station's starboard Solar Alpha Rotary Joint (SARJ) and gathered samples of "shavings" he found under the joint's multi-layer insulation covers. (UPI Photo/NASA)