Is this some kind of game you're playing, or do you really not understand my argument?
100% effective security is impossible; we will be attacked again.
When that attack happens, political opponents of the President (especially if that person is a Democrat) will be blamed for security failures, whether there were any or not.
Thus, if an attack occurs in the next two years, Obama will be blamed by Romney or Palin or whoever for failing to keep America safe. This implies, of course, that there was some actual way to prevent said attack.
The people making these political attacks will have no actual solution that would have stopped said attack from occuring (the security problem), but will ramble on anyway, never advancing a positive idea, and complaining about vague things like Democratic wimpiness and the need to double-down on the war on terror.
This is why Obama CANNOT get rid of the scanners or stop the pat-downs. If a bomb goes off in a plane after he ordered the machines removed, he would be impeached.
If that wasn't clear, could you please explain what you're having trouble with instead of just repeating the same sentence over and over?