Two U.S. astronauts finished a 6½-hour spacewalk on Wednesday to prepare parking spots for new commercial space taxis, and then discovered water had leaked into a spacesuit helmet, a problem that led to the near-drowning of another astronaut in 2013, officials said.
Unlike the 2013 incident, astronaut Terry Virts was not in any danger, said NASA mission commentator Rob Navias.
Virts discovered a small amount of water was floating in his helmet after he and spacewalk partner Barry "Butch" Wilmore had returned to the station's airlock following a successful outing.