Profiling
Sometime in the 90s (I think 1995 after the Oklahoma bombing) I was travelling from Buenos Aires to New York. I recall before I left the UK there were concerns at the time that heightened US security might impede or delay my travel. I turned up at the UA check-in and joined the queue, A man was talking to each passenger in turn. When he came to me he asked to see my passport and ticket, and he asked me a few questions about where I was going and why. Then he moved on to the guy behind me.
I guess that's profiling. If it was used 10 years ago in response to a percieved threat, then why not today?