I read recently that since 9/11 there have been maybe twenty acts of "terrorism" in the US, mostly nutters losing the plot and killing fellow soldiers etc and one or two "shoe bomber" type attempts; whatever, it's minuscule, especially compared to the Troubles back in the bad old days in Northern Ireland. I can't remember the figures, but let's say it works out to a billion dollars a year spent on the domestic "war on terrorism" for each death.
Compare that to the road toll, or the tens of thousand of deaths each year from US gun murders in that time and it all looks ridiculous.
Ffs, more more people kill themselves with lawn mowers in the US each year than die from terrorism.
Maybe it's like make-believe elephant repellent. See any elephants now? Must be working then.
What goes up...better bloody stay up (until I say otherwise).