Haven't been through the magnetic scanner in some time. TSA is using the more intrusive cage now. Go in the box, raise your arms and the thingy is supposed to find whatever is on your body. It seems to find breast implants, replacement knees and hips, glitter on jeans and other clothes, sex toys being worn and similar. But, so far, hasn't triggered at all on my titanium spine. It did alarm on my upper back and one shoulder last flight. Interesting because there is nothing there; well muscle and bone.