Drones are biggest tactical concern since the rise of IEDs in Iraq, CENTCOM boss says February 8 A small ISIS drone, captured by Iraqi police, rests on a table at an intelligence-sharing meeting at Qayyarah West Airfield, in Iraq, (Jason Hull/Army) Aerial technologies once viewed as hobbyist toys have triggered alarms at U.S. Central Command. The proliferation of small, cheap drones is the “most concerning tactical development” since the rise of the improvised explosive device in Iraq, Marine Gen. Kenneth McKenzie, who helms CENTCOM, said in prepared remarks at the Middle East Institute on Monday. The concerns are amplified by the lack of a dependable countermeasure against those drones, according to McKenzie.