@Oct ... No, you don't need much power to cause chaos, hence the Navy Yard and all of the other mass shootings we've had lately. But let's look for a moment at 9/11 (I don't think you live in the United States if I remember correctly, so maybe you didn't hear much on this). The feds issued a pretty scary statement. They said that we'd see huge increases in security throughout the nation on the 10th anniversary of 9/11 a few years back. They said the same thing this year; in fact, they even placed certain travel restrictions in order to ensure that nothing too crazy bad would happen. They pretty much scared the living shit out of people, especially those that happened to be traveling during a notoriously busy time in the post-summer business season.
And what happened? Nada. Nothing. They didn't stop any terrorist plots because there were none to stop. They didn't hamper anyone's plans. All they did was remind us all that we're basically under the control of a few hundred bearded guys with AK's living in shuttered compounds in Pakistan.
There are basically two ways to look at it and personally I can go for either one. The most widely believed sentiment at least around here is that the terrorists have so few usable resources (and manpower) that they are resorting to psychological terrorism. They are sending out all these plans with the intent of being sniffed out, hoping that their transmissions will get interrupted and letting the American government do all the work while they sit back and laugh their asses off watching CNN. If that's true, it's absolutely deplorable what our intelligence money goes into, don't you think? The other way to look at it, which I find more likely if the NSA and friends are so busy spying on Americans and lately upper-class Europeans (yes, it's been going on for a long time, but the intelligence budget is increasing year-by-year anyway), is that the United States knows that the terrorists are down right now, and they simply want to keep making excuses for Guantanamo and other government projects of the like. The motivations for this are largely unclear, but the reason for suspicion is definitely there.
Again, I'd readily subscribe to either.
@Al ... that's still different. I'm thinking of when there are 20,000 people gathered outside Fenway Park for game six of the World Series (hopefully Boston is spared another attack, but they don't have heightened security outside the stadium despite the bombings still so recent in our memories) waiting to punch their tickets into the game. I don't know if you've ever seen Gate C, but those rafters wouldn't withstand an attack. They'd kill a hundred people, hospitalize another thousand, destroy an iconic part of an iconic stadium, and scare me away from Boston forevermore. Fortunately that's all hypothetical.
And no, I wasn't the first to think of this. One of my friends in Israel mentioned this in 2005 when he came to Indy for a few months and we took him to the Indy 500. There are literally thousands of people in a half-acre of space every year there and it's a damn scary thought to comprehend.