I do wonder about their source data. I find it hard to believe that they have been able to perform proper surveys.<p>Thus i wonder if what we end up with is a speculation based on the identities of those found to have performed spectacular operations in the name of some group or other.<p>And there i suspect we will find more engineers, because you need a certain set of skills and methodological thinking to pull them off.<p>Their equivalent of a engineering corps basically.