[thackney]

the worst school disaster in US history

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Intentional disaster, but there were worse accident/negligent disaster

New London School explosion
http://www.tshaonline.org/handbook/online/articles/yqn01
March 18, 1937

Of the 500 students and forty teachers in the building, approximately 298 died.

[Impala64ssa]

That reminds me of another tragic accident when i was in HS,involving a school bus at a RR crossing in Congers, NY in 1971.I grew up just a few miles from there.