Terrifying helicopter footage shows a tornado rampaging across Oklahoma, with at least seven dead and dozens more injured across three southern states.
The two-minute clip - in which the cameraman yells - "it's huge, wow, unbelievable" - shows the killer storm cutting through the towns of Ardmore and Springer.
Tornadoes and other storms also swept through Texas and Louisiana on Wednesday and Thursday. More than 7,000 people across Oklahoma and about 9,000 people in Onalaska, Texas, faced power outages.
Images in local media showed the devastation caused by the storms, including damage to homes, downing of power lines and twisted billboards.