A mile-wide tornado wrecked a path of destruction in Moore, Oklah., on Monday. The tornado was so big, "it looked like a cloud" on the ground, said some reporters on the scene. A KFOR TV helicopter which was filming the intial tornado flew by the damage after the storm had cleared, showing a scene of complete destruction.
The tornado touched down south of Oklahoma City, perhaps near a casino where people were sheltered, a helicopter pilot for NBC station KFOR reported.
Tens of millions of people from Texas to the Great Lakes were warned to brace for severe weather one day after a tornado outbreak killed two elderly men in Oklahoma and turned a trailer park into splinters.
The KFOR television footage showed flattened buildings and fires.
A KFOR TV reporter stated: "This is the most destructive tornado in the history of the world."
There were no immediate reports of injuries.
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