The focus is on keeping planes in the air and no one seems to get that they don't need to reach a plane to do us in. Several time-coordinated suicide bombers, in the middle of long lines at major airports, will kill just as many, if not more of us and have the same effect.
If/when that happens, the government will go nuts and really put it's shoe on the back of our necks to "protect" us.
http://www.israel21c.org/technology/israeli-airport-technology-detects-intent-of-terrorists
Technology is available...
Why we are doing what we’re doing is indefensible.