If you were watching television on September 11, 2001, this is what your subconscious heard...
I've long been interested in the techniques demonstrated by Derren Brown on his "Mind Control" programs in the US (SciFi Channel) and the UK (BBC), especially when he demonstrates that by repeating words over and over again in such a way that people don't even notice you're doing it, you can put ideas into their heads that they think are their own. (I think the science-y sounding name for it is "neuro linguistic programming")
I'm sure this was behind the choice of "United" and "American" airlines (instead of TWA, Delta, Southwest, Northwest, Sun Country, Air Alaska, etc etc etc) for the 9/11 attacks. I threw together a little video to demonstrate my point, using only a couple hours of NBC footage from that morning:
No wonder everybody felt like such "united" "americans" in the days following 9/11, obediently waiting for our heroic commander-in-chief to give us our marching orders.