April 17th, 2013
03:04 PM ET

Tracking suspects in Boston bombings

It's been more than 32 hours now since two explosions went off at the finish line of the Boston Marathon.

It's a crucial time period for investigators as they search for a suspect.

OutFront tonight: Andrew Gumble, author of Oklahoma City Bombing: What The Investigation Missed – and Why It Still Matters and Sean Smith is a former assistant secretary of Homeland Security.

Filed under: Boston Marathon Explosion • News • Terror Attack
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