ISIS is manufacturing weapons at an alarming rate
Raqqa Media Center/AP
In contrast to their use as traps or along roadsides, IS has used vehicles rigged with bombs and improvised explosive devices (IEDs) much as the US has traditionally used air power: as a means of assaulting ground forces and opening up targets to attacks by infantry units.
"It is a very effective weapon and we have taken great efforts to advance our targeting capabilities in order to allow us to find these locations where IEDs are being produced and target them appropriately," Marine Corps Brig. Gen. Thomas Weidley, the chief of staff for the air war in Iraq and Syria, told reporters recently.
The asymmetric nature of the tactic can seem astounding — with the Pentagon spending more than $9 million a day to fight the insurgency, IS is constructing bombs virtually for free.
IS is manufacturing the weapons at an alarming rate, using everything from fertilizer to military grade explosives.