Earlier quoted context omitted.
Is it a risk if you stay in the airport, in the secure zone? (Whatever it's called...I've flown rarely over the past couple of decades.)
Yes, on a flight to and from New Zealand with a refuel/crew change in LA I was fingerprinted, retina scanned and asked about my personal business despite being held in the "secure" zone. This was 2005 so they didn't have such a hard-on for electronic devices back then. Seeing as the US has upped its game quite a bit since then, the likelihood of me ever visiting the US is now zero. Sorry my fellow US HN'rs. And you k…
It's not just 5 countries: https://en.wikipedia.org/wiki/Five_Eyes