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The Boston Globe

Metro

Officials to hold largest security drill in Boston’s history

The largest security training exercise in Boston’s history is slated to kick off at 8 a.m. Saturday with a simulated active school shooter drill in Brookline. It will continue with other drills during 24 hours and involve about 2,000 state and local personnel.

“The Urban Shield Program, as we’ve learned over the last year, is essential to our city’s safety at any time of crisis,” Mayor Martin J. Walsh of Boston.

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