I recall a security person barking out at the crowd, “No laughing!” I thought this was a bit drastic, but having lived in NYC on that horrible day in 01, and feeling the security had been somewhat problematic previously, I did not really mind it (except for the lines). It was also on the way home from ASTD. I was in a different job with different expectations. Different time. Different skills. Different experiences. Different colleagues, interests, technology, education, and plans for the future.
While we did not get barked at in line this time, I still feel the security here is strong, and am glad that whatever training the TSA staff have had in the intervening years, they have continued to stress what is important, while leaving the rest behind. Good lesson for all in workplace learning and performance.