Securing a Marathon a "Unique" Challenge | NBC Chicago
[NATL]Terror in Boston: Boston Marathon Explosions

NATL

Three Dead, Hundreds Injured After Explosions Near Marathon Finish

Securing a Marathon a "Unique" Challenge

Few people believe security will be the same in the wake of the Boston blasts, but on a course that's 26.2 miles long, securing it is a big job. Nesita Kwan reports.

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