I am too young to remember these when they were around, but I like to remind Millennials that there was a time worse than the "post-9/11" world:
The company I work for had everyone take "Millennial" training, which of course, was a presentation put on by a Millennial. One of the key points they tried to make was that growing up in an insecure post-9/11 has made them somehow more hardened and bold.