On The Home Front Line
Law enforcement officials constantly remind New Yorkers to be vigilant, report suspicious people or packages and generally keep their eyes open in order to help stop a terrorist attack.
While this is a great idea in theory, it has little practical value. The reason is that the average person is probably pretty frightened to either call in a false alarm or mistakenly finger an innocent as a terrorist. I commute into NY city every day on the Long Island Railroad and every day I see something suspicious, but I never say anything. This is NY, you see everything imaginable all the time.
This is why the terrorists were able to succeed in London, and eventually will hit us again. Ten pounds of explosive can be hidden anywhere, it cannot be seen or sensed by anyone.