Two astronauts aborted their spacewalk Friday and hurried back into the International Space Station after water leaked into one of the men's helmets in a scary repeat of a near-drowning 2½ years ago.<br />The trouble cropped up after the astronauts - including Britain's 1st spacewalker - successfully restored full power to the space station.<br />Lead flight director Royce Renfrew, who called an early end to the spacewalk, stressed that the situation was not an emergency and insisted neither spacewalker was in danger.<br />That's nothing, NASA officials pointed out, compared with the 1 to 1½ liters of water that escaped into Italian astronaut Luca Parmitano's helmet and suit in July 2013.<br />Working in darkness to avoid electrical shock from the solar power system, the astronauts quickly removed the bad unit and popped in a spare, both about the size of a 30-gallon aquarium.
