6 astronauts did a spacewalk to address ammonia leaking from the International Space Station . They inspected the site of the leak and replaced a pump controller box on the orbiter . Afterward , initial tests showed no sign of a continuing leak , which was spotted Thursday , . 5Â½-hour of the 3 men involved in the 6 spacewalk are set to leave for Earth on Thursday .
2 astronauts did a spacewalk to address ammonia leaking from the International Space Station . They inspected the site of the leak and replaced a pump controller box on the orbiter . Afterward , initial tests showed no sign of a continuing leak , which was spotted Thursday , . 3 of the 6 men involved in the 5Â½-hour spacewalk are set to leave for Earth on Monday .