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ST. LOUIS (KSDK) - There is no one in custody for the Boston Marathon explosions, but authorities have started to look at surveillance video in the area to see if they can learn more.

Dr. Morris Taylor, a terrorism expert with Southern Illinois University Edwardsville joined NewsChannel 5 at 10 p.m. to talk about his reaction to the blasts.

Click the video player above to hear his take on the explosions.