I believe she is referring to opting out of the full body scanners[1] in American airports. One can do that by telling the TSA agent that they'd like to opt out

I believe she is referring to opting out of the full body scanners[1] in American airports. One can do that by telling the TSA agent that they'd like to opt out of the scanner. They will instead do a manual pat down. 1: https://en.wikipedia.org/wiki/Full_body_scanner https://en.wikipedia.org/wiki/Full_body_scanner