Actually Bath was worse
The Bath School disaster was a series of bombings in Bath Township, Michigan, USA, on May 18, 1927, which killed 45 people and injured 58. Most of the victims were children in second to sixth grades attending the Bath Consolidated School. The bombings constituted the deadliest act of mass murder in a school in U.S. history.
I just watched the news for a few minutes--MSNBC keeps touting this as the worst massacre of its kind (they can hardly hide their ghoulish glee), and only as an aside do they note that this is the worst shooting rampage of its kind. They sure wouldn't want to own up to the fact that guns aren't the only way to kill a whole bunch of people.
If all you folks thought Rosie was unbearable before, stock up on your antacids.