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The Boston Globe

Metro

‘No magic bullet’ to stop terrorism, Davis tells forum

Vigilance urged as threat expands

LOWELL — There were 854 uniformed and undercover Boston police officers assigned on Marathon Monday to patrol the three miles from Cleveland Circle to Copley Square, many with their backs to the runners, scanning the crowd for potential threats.

State Police had nearly 1,000 troopers on the course from Hopkinton to the Back Bay, and the National Guard had about 200 soldiers helping out. Boston police, with help from transit officers, used specially trained dogs twice to sweep much of Boylston Street for explosives at 7 a.m. and then shortly before the elite runners approached the finish line.

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