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chiou oklahoma tornado explainer_00011212.jpg
chiou oklahoma tornado explainer_00011212.jpg

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    Are tornadoes getting stronger?

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Are tornadoes getting stronger?

CNN's Pauline Chiou explains the size of the tornado in Oklahoma compared to international landmarks.

Are tornadoes getting stronger?

CNN's Pauline Chiou explains the size of the tornado in Oklahoma compared to international landmarks.