equipment cool. they believe the problem is pinpointed but it will take several days before they know for sure. >> we think it's a control valve inside the module itself. if necessary, we can have the crew do an eva or space walk and change out the full control valve. >> this summer a space walk had to be cut short after one of the astronaut's helmets started filling with water. the crew injured but the walk lasted an hour and a half instead of more than six hours it was scheduled for. at that time crews were prepping the station for the arrival of a russian laboratory module. nasa officials tell us if it's not a physical hardware issue, it could be a software issue. if that's the case they could upload a patch and it could