Chat with us in Facebook Messenger. Find out what's happening in the world as it unfolds.

intv harlow kayyem boston marathon_00023207
intv harlow kayyem boston marathon_00023207

    JUST WATCHED

    What have we learned from the Boston Marathon bombing?

MUST WATCH

What have we learned from the Boston Marathon bombing?

Lessons continue to be learned from the Boston Marathon bombing. CNN's Poppy Harlow and Juliette Kayyem discuss the lessons.

What have we learned from the Boston Marathon bombing?

Lessons continue to be learned from the Boston Marathon bombing. CNN's Poppy Harlow and Juliette Kayyem discuss the lessons.