I could get a knife on easily. As proven by, off the top of my head, Adam Savage, who walked right through "security" with a pair of foot-long razors in his carry-on bag!
Of course you can get an knife on, porcelain knives have no metal.
small stiletto can be slipped in with pens and not be seen. plastic box cutter can also be slipped in among pens or even the back of a computer case.
You can kill with paper or a paperclip and no one is going to stop you from carry those onto a plane.
Even a wire or string can be used
Toxic chemical even in small amounts can incapacitate passengers on a plane making it hard for them to breath or partially blind them.
With planning you can put different parts onto a plane with maintenance at stopovers that can be retrieved and assembled by a passenger who knows where to find them.
We can make wooden and even plastic guns from zip guns to fully functioning
It is smart to keep obvious weapons off the planes but it is just a bandaid to a much greater problem of hate or desperation
Methods of death will just keep getting more complex and harder to prevent.
TSA is a necessary deterrent but it will never be foolproof. Every day people will always have be aware and be willing to say something or in some case act if there is danger to others.
We have to protect ourselves if we see things that seem out of place or odd. We cannot walk around with blinders on and expect others to see everything for us.
Even a flashlight or Iphone can be use to stun or distract a would be criminal, just enough to take action against them.
