Local Law Enforcement Agencies Receive 2 New Bomb DogsTwo Labrador retrievers, Charlie and Waverly, were trained together and now offer an extra layer of protection aboard regional transit trains and at UC Davis.
Pressure Cooker Bombs Suspected In Boston BlastFederal agents zeroed in Tuesday on how the Boston Marathon bombing was carried out — with kitchen pressure cookers packed with explosives, nails and other lethal shrapnel — but said they still didn't know who did it and why.

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