Mass shootings in U.S. history
POSTED: 07:20 AM PDT Jul 20, 2012
UPDATED: 08:23 AM PDT Aug 24, 2012
Take a look at some of the worst mass shootings in U.S. history.
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Sept. 2, 2008: Isaac Zamora, 28, was accused of killed six people in Alger, Wash., and wounding two others before turning himself into authorities. His mother described him to The Seattle Times as “extremely mentally ill,” and authorities said he had been released from jail the month before.
