Given the fair probability that this is middle eastern related, we can expect the cycle to continue of the US getting more involved in the Mideast followed by more terrorists attacks, followed by more police state restrictions, more terrorists attacks, more US Mideast involvement spiraling down the rat hole.
Imagine if the US just packed its bags and left the Mideast to it's own devices. In 5 years all the TSA employees could be sacked.
But the real issue would be how to justify the billions sunk into the military industrial complex.
My thoughts go out to all the victims of this insanity from Boston to Afghanistan.