I remember being on a train in Eastern Europe and being terrorized in the middle of the night by officious men in epaulets demanding to see everyone's papers.
I said to my friend, "Glad we don't live in a 'show me your papers' country." That seems rather quaint now. www.bbc.co.uk/news/article...
US will review 55 million visa holders for potential violations - BBC News
A US state department official says US visa holders will face "continuous vetting".