There are parts of my commute in the morning that are just scary. Hundreds, perhaps thousands of people boxed into tight quarters, all funneling out of commuter trains at peak rush hour and waiting in massive lines to get up stairs/escalators to street level (through exits that just weren't designed to accommodate that kind of volume way back when). I often wonder not if, but when one of these lunatics will attack in that context. I wonder whether someone could just stroll in off the street and do that, or if whether, perhaps, our military and police have such incredible technology that they could somehow prevent that or see it coming from a mile away, despite all the chaotic foot traffic from hundreds of thousands of people in all directions. I often wonder when something like that will happen. And of course we have lives to lead, and jobs to work, and we just need to go about our routines, hoping that it doesn't happen, or hoping we're just not there -- and too many people aren't in the vicinity -- if something actually does happen.
Hoping they catch this guy swiftly, waterboard him into oblivion as he spills every bit of useful intel he's got, and then put him in a cage with no light for the next 60 years.