I have not paid for but have been given the pre-check on my tickets. I have total knee replacements in both knees. Was not a problem leaving my home airport, as there was an x-ray on the pre-check side. But when returning from Raleigh-Durham, had to get a pat down because, of course, I set off the walk through, but they did not have x-ray on that line. Had I gone through the regular line, would not have had the issue. I know now to look ahead for the x-ray before getting into a line!
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