Just a week before Christmas, 1972, the wife of newly-elected Sen. Joe Biden and the couple's baby daughter were killed - and their two sons badly injured - when the Biden family car was broadsided by a truck at an intersection in Delaware. The truck driver, Curtis Dunn, was never charged in the crash. But, his daughter Pam Hamill says, he too, suffered, reports CBS News correspondent Bob Orr. "He grieved over that," Hamill said. "He was haunted and was tormented by that for years." Dunn died in 1999, but since then his family has endured widespread rumors and reports...