Authorities searching for the latest, the second in two days
                                
                                
                                    (Newser) -
                                    Yesterday, a man  survived a drop  over the Canadian Horseshoe section of Niagara Falls; today, another person has apparently plunged over the falls on the US side, reports the  Buffalo News . The rocks on the American side make survival unlikely, "but we've got to keep looking," says...