The terrorists are running around with rocket propelled missiles that Obama gave them!! That is what they are fearing and why the threat assessments to local law enforcement are classified IMHO.
Unfortunately the underground armament business is doing well now....only with an investigation , and that is being done, can they know the hands which these missles travel before their ultimate destination.
I learned long ago...the US markings on any piece of armament used only means ‘made by’....not necessary “given” to the the hands that use them.
We’ve armed so many in the Middle East for years that these pass from one border to the next.....legally and not.