first up, though, the shuttle launch, the next to last shuttle mission ever was supposed to take off friday afternoon, but just a few hours before the scheduled launch, nasa put things on hold. up till a problem with the heating system could be sorted out. among the hundreds of thousands of speculators was congresswoman gabrielle giffords of arizona. that's because her husband mark kelly is the shuttle commander. giffords left a houston hospital earlier in the week to travel to kennedy space center. she's been recuperating from a gunshot wound to the head from an assassination attempt in january. you can just make her out there, boarding the plane to florida. seeing her walk, by herself. it's a huge milestone. lately i've been doing some digging into what people call a remarkable medical care that gabby has been receiving. one key part of that was the