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The police supervisor who oversaw the response to the Boston Marathon bombing last year says one of the keys to preparing for terrorist attacks is conjuring up worst-case scenarios.
Daniel Linskey, the Boston Police superintendent-in-chief, says he has "evil geniuses" on staff to help plan drills. The training paid off last year when police locked down the city, guarded hospitals and swept for extra bombs.
Linskey addressed local police and homeland security students at Towson University on Friday afternoon. He said the disaster also taught him about social media coordination and sorting through poor intelligence.
The bombing anniversary will be on Tuesday. At this year's marathon on April 21, police are tightening security and asking spectators not to bring backpacks if possible. They still hope for a big turnout.