I came thru security this morning at Honolulu international. I was asked if I have any implants. I have 2 knee replacements. I was given a yellow card that said I was required to remove any electronics bigger than a cell phone and directed to go thru a scanner. I thought this was odd as I was a TSA pre check and I have a global pass. I didn't get any kind of answer from the TSA agent. Is this some kind of new security issue? If so isn't it a bit discriminatory. A fellow passenger who was in a wheelchair breezed right thru and she told me she had an implant.