Spacewalkers Clayton Anderson (L) and Rick Mastracchio work on the International Space Station’s P6 truss relocating two crew equipment translation aid (CETA) carts with the earth in the background in this view from NASA TV August 15, 2007. Anderson and fellow spacewalker Rick Mastracchio are scheduled to spend 6.5 hours outside the station preparing the International Space Station’s Port 6 (P6) truss for relocation and upgrading a communications system along with other tasks. NASA flight controllers decided to end Wednesday’s spacewalk early because of damage to the outer layer of one spacewalker’s gloves.