Gen. David Petraeus, Former CIA Director, Fmr. Central Commander and American commander in Iraq. Adam Jeffery | CNBC Unmanned systems will present the greatest danger and structural growth opportunity over the next decade, former CIA director David Petraeus said, pointing to conflicts in Iran and Ukraine as evidence of how warfare is rapidly evolving. Speaking at the UBS Asian Investment Conference, Petraeus said the increasing use of drones in conflict zones showed both the growing danger of unmanned weapo ...