Take a look at the 12 deadliest fires in U.S. history.
1. World Trade Center explosion -- More than 2,600 people perished after two planes crashed into New York's World Trade Center on Sept. 11, 2001, causing intense fires that ultimately led to the Twin Towers' collapse.
Danny Moloshok / Reuters
Boy Scouts of America
Library of Congress
Auction Team Breker
Chuck Kennedy/The White House
JASON REDMOND / Reuters
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