Spacewalk planned to fix ammonia leak on space station

MIAMI, May 11:  NASA plans to send two astronauts aboard the International Space Station out on a spacewalk today to try to fix an ammonia leak in a cooling system on one of the station’s solar arrays, the U.S. Space agency said yesterday. The crew spotted a steady stream of small, white frozen ammonia flakes floating away from a coolant line outside the orbital outpost on Thursday. (agencies)