BREAKING NEWS: One Hurt In New York City Explosion | Read More | Watch CBS News Live
Drones Will Provide Extra Security Above Boston MarathonThe goal is to scan the crowds and detect threats with some of the most agile technology available.
Bomb Sniffing K-9's Run Boston Marathon Training Drills In Everett They are friendly, furry and very highly trained. K-9 units drilling this week in Everett hold a key piece of Boston Marathon security in their paws.

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