I believe Mayor Bloomberg and NYC authorities have stated that there is no reason to believe this recent incident has the markings of al-CIA-duh, the Taliban, or any other middle eastern boogeymen despite some off hand claim of responsibility by a Pakistani Taliban group.

If you think about it,......if you are trying to recruit illiterate goat farmers to your cause in taking down the western world why would you lay claim to an amateur hour fireworks bomb attempt that killed or injured absolutely no one? I'd probably leave that one off the resume.

Interestingly enough, the report of that claim of responsibility came from SITE intelligence. The same Pentagon funded intelligence group known to be an arm of the Israeli Mossad and the same group that brought us many of the now discredited Bin Laden tapes.
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On a long enough timeline the survival rate for everyone drops to zero.