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Tornado Darkens Sky

Photo: Impending tornado darkens the sky
An impending tornado darkens skies over the Colorado plains. Most tornadoes are 400 to 500 feet (122 to 152 meters) wide, travel four or five miles (six to eight kilometers) and last just a few minutes.
Photograph by Priit Vesilind

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Photo: El Capitan and the Merced River

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