He was once a seven-time winner of the Tour de France and a man admired around the world. When Lance Armstrong's career came crashing down, it became one of the great tragedies in the world of sports. There are so many questions left unanswered. The new book "Wheelmen: Lance Armstrong.. the Tour de France and the greatest sports conspiracy ever" explains how he got away with doping for so long, and who helped him. Anderson spoke with authors Vanessa O'Connell and Reed Albergotti, who are also reporters for the Wall Street Journal.