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Tornadoes, Hail, Damaging Winds Saturday: Texas to the Dakotas
Map: Current Severe Weather Warnings
Teenager Designs Safer Nuclear Power Plants
Mount Saint Helens has erupted several times since the destructive 1980 eruption, and likely will again in the future.
Astronomers say radiation will disrupt cell phone, radio and GPS communications, and could potentially lead to "one heck of an aurora."