Just a few words on the absurdity of moving security checkpoints to the entrances of airports, instead of between the ticket counters and the gates:

Security checkpoints are there to make sure that people don't have access to bad things on planes. Moving checkpoints outside the terminal in reaction to events like the gunman at the LAX ticket counter is just stupid, because no matter where you put a checkpoint, there will always be a throng of people somewhere outside the secure perimiter, be it on the curb, or at a nearby McDonalds, where someone can point a gun and shoot. This isn't the sort of thing airport security checkpoints are supposed to prevent.

Also, performing a security sweep while you're still in control of the bags you're planning on checking is problematic. Now everything in your bag has to be as tweezer, knitting-needle, and toenail-clipper-free as you and your carryon bag have to be now, because who's to say you couldn't take things out of your to-be-checked suitcase, after the checkpoint and before checking bags?

Really, if we're going to push security to the curb, we may as well push it to the other curb, and make sure that nobody can leave their own house with anything more dangerous than a sharp wit.

But how would we staff that?