Paper Tiger offers this piece :
That requires two basic assumptions:
a) there are local terrorists in the US
You assert, then, there are NO local terrorists in the U.S. ?
Have you ever heard of U.S. Army Major Nidal Hassan ??
Also, don't worry yourself about badguys obtaining the latest, or even outdated MANPADS and sighting in on arrival/departure corridors at any random busy airport. They wouldn't even need any loaded toners aboard target aircraft.