How Will Investigators Figure Out Who's Behind The Suspicious Packages?

Investigators have a big task in front of them to find the person or people behind several suspicious packages sent to prominent Democrats, including former President Obama.

Here & Now's Jeremy Hobson speaks with Jimmie Oxley, a chemistry professor at the University of Rhode Island and co-director of its Center of Excellence in Explosives, Detection, Mitigation, and Response. She's assisted federal investigators in analyzing bombing incidents.