Deadly crash at the border - The Lead with Jake Tapper

As today's show begins, the FBI is investigating a car explosion at the US-Canadian border near Niagara Falls. Two people in the car died. This happened just a few hours ago at the Rainbow Bridge connecting New York and Canada. According to law enforcement services, the car accelerated in the US side, went airborne, and crashed and exploded near a checkpoint. In response, authorities shut down all four land-border crossings between the US and Canada near Niagara Falls. Our coverage begins with CNN's Brynn Gingras.