SLEEPING GIANT: Mount Rainier could erupt someday just as Mount St. Helens did in 1980, or parts of it could collapse and spawn large mudflows at any time.
SHEER NUMBERS: Some experts consider Rainier to be the most dangerous volcano in the world.
DRY RUN: Public officials conducted an emergency response exercise last week. Later this month, students will practice evacuating and walking to higher ground.
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