Oh finally, someone talks about the disasters long forgotten, St. Helens and the Hindenburg. On that note,where is the disaster that became famous, then forgotten: the Boston Molasses Flood?
I can't believe you didn't mention the Great Fire of 1871 in this quiz. It burnt several cities to the ground and was the biggest fire in American history. You mentioned several other American fires but forgot the biggest one
http://en.wikipedia.org/wiki/Largest_artificial_non-nuclear_explosions