If you see an increased police presence in Boston this weekend, it might be part of a drill.
Two thousand law enforcement officials will take part in the biggest security drill in the city's history this weekend.
It's called the Urban Shield Program and for 24 hours, they will be conducting drills simulating large-scale public safety events in 11 different scenarios.
The organizers said the scenarios will be run multiple times but there is no danger to the public.
The training will wrap up Sunday morning.
Some of the drills included in the program are listed below:
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