Since 9/11 we've either been lucky, or our security measures have more, or less worked. Not to diminish the efforts of the FBI and others, but I think we've been lucky. Sooner, or later the muslim terrorists will be successful and it will be the unwillingness of our politicians to do what has to be done that will be the blame. And for that, they (the politicians) should be hung for treason.
What should be done? Simple--stop all immigration and get rid of all muslims who are not citizens and those who are citizens, especially those who were foreign born, must be watched, very carefully. Or we could do what FDR did and put em all in a pen.