I’ll add to the uselessness of the security methods. I have an artificial hip. I set of the walkthrough scanner every time. I allow extra time in all airports for this reason. However, their hand wands cannot detect my hip 90% of the time. What good is it to be alerted to a potential threat if you can’t find it. They do not seem perturbed by this. In fact, after a desultory patdown they wave me on board. I do not look or generally walk like I’m disabled. On the occasional days that it is bothering me and I have to use a handicapped space I get dirty looks. I find this less than reassuring.