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April 21st, 2013
03:05 PM ET

Tracking down the killers

John Negroponte, Jim Johnson and Candice DeLong on the radical roots of the killers, profiling a motive and the role of technology in tracking down the killers.

April 21st, 2013
02:56 PM ET

The hunt for a motive in the Boston bombings

Establishing the motive behind the deadly Boston bombings. A conversation with experts on national security former FBI agents Tom Fuentes and profiler Candice DeLong, Police Chief Jim Johnson, and former DNI John Negroponte.

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