School Shootings Hard to Prevent, Falkenrath Says

Dec. 14 (Bloomberg) -- Richard Falkenrath, a former New York City deputy police commissioner who is now a principal at the Chertoff Group, talks about today's mass shooting at an elementary school in Newtown, Connecticut. Falkenrath, a Bloomberg Television contributing editor, talks with Adam Johnson and Trish Regan on Bloomberg Television's "Street Smart." (Source: Bloomberg)