"In many ways, we could say that it's better that they (the authorities) did at least know who he (the bomber) was. So at least they were looking in the right places rather than not knowing who he was. It would be more shocking in many ways if suddenly it was someone who appeared out of the blue who could make bombs and kill this many people. The fact that at least he's shown up in investigations demonstrates that at least they're looking in the right places. The difficulty comes in the prioritization question, and this is what we've seen repeatedly over time with terrorist investigations."