Momentous events have a way of connecting individuals both to history and to one another. So it was on September 11. Even before more than 4000 people died in less than two hours, there were farewell messages from the sky. In their last minutes, doomed passengers used cell phones to reach loved ones. A short time later, office workers trapped high in the burning towers called spouses, children, parents. Never had so many had the means to say good-bye...