Too bad. Yet another useless security measure that inconveniences passengers and does nothing to increase safety. I’ve said it before: security measures at airports are all about optics (see, we’re doing something!) and nothing to do with actual security at all.
The most effective measure for aircraft security would cost them absolutely nothing and improve both security and safety, but as far as I know nobody has taken that step. (if you are wondering what it is, simply this: do not allow passengers to wander around and stand in the aisle waiting to use the washroom. No better way for a terrorist to position himself exactly where he wants to be. Solution: put on your call light and take a number to use the can. Walk singly down the aisle so you can be observed, and anything you are carrying inspected. Even disregarding the terrorist threat, it is unsafe for passengers to stand around in the aisles. Clear air turbulence cannot be accurately predicted, and injuries can and have resulted with unbelted passengers.)
As far as the airports themselves, nobody checks anything until you hit the security line, so you are free to bring whatever explosives you wish with you in your checked luggage, carry on, car or truck, whatever. You don’t have to board an aircraft and blow it up to seriously disrupt transportation. A detonation anywhere in the airport, and particularly in a crowded security line, would work just fine. Seems the Israelis are the only ones who have this figured out!