Video shows aircraft wreckage in Potomac River as the sun rises near Washington, DC, after the collision between an American Airlines jet and a US Army Black Hawk helicopter. Emergency authorities have switched to a “recovery effort” and there are not believed to be any survivors from the incident,

Crews working to retrieve the passengers of the American Airlines jet and the army helicopter that collided and crashed into the Potomac on Wednesday night have to contend with the dangerously cold waters of the Potomac River.