ISS astronauts start AMS repair

A series of joint NASA and ESA spacewalks four years in the making aims to extend the life of the AMS particle detector. Normally, cutting a zip tie is an easy task. But when astronauts on a spacewalk from the International Space Station do it, it's a different story. "In your garage, that may not sound like a big deal," aerospace engineer Tara Jochim from NASA said during a briefing on Wednesday. "You can snip your zip tie with scissors or whatever tool you have, let that zip tie fall to the gr...