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Moore, Oklahoma tornado damage
Storm survey crews reach the area of worst damage and confirm the twister was one of the country's worst.
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wildfire-wallow-arizona-110614
Have dense forests become an environmental hazard?
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acoustics, environment, geology, oceans, noise, energy
Tide-borne pebbles on the seabed can drown out other ocean noises.
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Oklahoma tornado tracks
Tornadoes hit the same spot twice west of Moore, Okla.
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A wider view of the elementary school flattened in Moore, Okla., on May 20, 2013, by a deadly tornado.
Survey teams will analyze the damage to help them reconstruct details of the tornado's life cycle.
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A deadly tornado touched down around Oklahoma City, Okla., on May 20, 2013.
Conditions above Moore were perfect for a violent vortex.
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