After Sen. Robert Byrd's death at age 92 on Monday, speculation began about plans for his memorial service, including rumors that the Senate's longest-serving member might lay in state in the Capitol rotunda or even on the Senate floor. ABC's Jonathan Karl reports on prospects for the second option: "If they family wants it, we'll do it," a Senate sources tells ABC News. It hasn't happened for a half century, but there is ample precedent for such a move.