That type of attack, exploding planes over US cities releasing nerve agents, would correlate with the Mahdi scripture that states 'the sky will turn fire' or 'be filled with fire'. That Mahdi related scripture then states there will be a lot of 'dead bodies all over the place'.
http://64.233.179.104/translate_c?hl=en&ie=UTF-8&oe=UTF-8&langpair=ar%7Cen&u=http://alsaha.fares.net/sahat%3F128%40255.SwvffCwoc6N.0%40.2cc148d6&prev=/language_tools
Mahdi related scripture like that makes it easy to understand why the Sunni consider such Shia heretics and have been trying to exterminate them for centuries. They certainly don't understand "Mohammed is the last prophet," which even most of us infidels realize is pretty basic to Islam. Some of their stuff makes even the DU seem sane by comparison.