Two astronauts cut short their spacewalk and hurried back to the safety of the international space station after a suit problem caused rising carbon dioxide levels for one of them.

ASTRONAUTS working inside and out installed a porch for experiments on Japan’s enormous space station lab, accomplishing the major objective despite microphone static that often drowned out the spacewalkers’ voices.

Employing the kind of NASA ingenuity used to avert disaster on the Apollo 13 mission, an astronaut prepared for an emergency repair job on Discovery’s exterior today with forceps, scissors and a hacksaw fashioned out of a blade and duct tape.