(WASHINGTON, DC) Astronaut Scott Parazynski did more than perform emergency surgery on a torn solar panel on the International Space Station today. At the end of his spacewalk, almost as an afterthought, he reached out with a 90-foot robotic arm and boom extension, and deftly snagged a strand of twine dangling from a mysterious bundle of space debris. “Yee haw,” was all that earthbound controllers could hear Parazynsky say into his space helmet at that moment. However, Col. Douglas H. Wheelock, giving visual cues to Parazynsky during what officials have termed the most dangerous spacewalk in history, shouted something else:...