AP Aerospace Writer
CAPE CANAVERAL, Fla. (AP) -- The spacewalking astronaut who came close to drowning in a flooded helmet searched for clues in his spacesuit Wednesday, in hopes of understanding the unprecedented water leak.
Engineers in Houston, meanwhile, conducted their own investigation into what should have been a routine, yet still risky, maintenance job outside the International Space Station.
But a day after one of NASA's most harrowing spacewalks in decades, answers eluded the experts.
"There still is no smoking gun or definite cause of what happened or why that water ended up" inside Luca Parmitano's spacesuit, said NASA spokesman Kelly Humphries.
Parmitano, Italy's first and only spacewalker, could not hear or speak by the time he re-entered the space station on Tuesday, 1
Copyright 2013 The Associated Press. All rights reserved. This material may not be published, broadcast, rewritten or redistributed.