The Christian Science Monitor Boston attack: Swath of city on lockdown as police scour for additional bombs “What we saw today was a relatively small-scale set of explosions,” says Stephen Flynn, co-director of the George J. Kostas Research Institute for Homeland Security at Northeastern University, in Boston. “The challenge with these smaller-scale attacks is that they are much harder to detect in the early stages – precisely because they don’t require much sophistication, planning, […]