Houston: IndianAmerican astronaut Sunita Williams, along with her crew mate ISS commanderMichael Lopez-Alegria, is out walking in space since morning and finished wranglingtough ammonia cooling lines outside the International Space Station (ISS) asthey shift them from a temporary arrangement to their permanent configuration.

The first of three spacewalks in nine days began yesterday at 9:14 a.M. CST.The two spacewalkers are supposed to reroute the station's LoopA cooling system into its primary set up.

A second cooling loop 'Loop B' will be rerouted during February 4 spacewalk.After returning to Earth in July, Expedition 14 and Expedition 15 FlightEngineer Sunita Williams will hold the NASA astronaut record for longest timein space.

Sunita also will have completed the most spacewalks by a woman by the end ofFebruary. By the end of Expedition 14 in April, Lopez-Alegria should lead allastronauts in the number of spacewalks and the amount of time spentspacewalking.

Lopez-Alegria will have set that record just months earlier. During spacewalkWednesday, NASA astronauts were running low on time and spacesuit batterypower, so had to stop any extra tasks known as 'get-aheads'at the end of first spacewalk outside the ISS.

The astronauts are stowing a pair of fluid lines that they stripped from anunneeded reservoir of spare ammonia coolant to complete the final major task oftheir spacewalk.