i'm thomas roberts. here's what's topping the news now. with her husband high above earth at the international space station. wounded congresswoman gab ree yell giffords is undergoing surgery today to replace a piece of her skull with a plastic implant. once healed giffords will no longer have to wear the protective helmet that she needed since shot in the head since january. a huge immigration bust on the u.s. border with mexico. this discovery happened when mexican state police used their x-ray equipment at a check point stop. look at this image, 513 migrants from nine different countries found crammed inside two trucks bound if for the u.s. some of them for suffering from dehydration and lack of oxygen after traveling for hours. officials said smugglers were charging $7,000 each to get them safely to the u.s. one of the best hopes for a bipartisan agreement on solving the debt dilemma took a significant hit on capitol hill. oklahoma senator tom coburn