LOL!!! It's late; maybe that's why I'm laughing like a maniac over this...
I used to work in Aspen several times each summer. You can go 4 years and not be bothered and get sick the 5th time you go. Or you can get off the plane and be sick for the next few days. Probably one person got sick from the altitude at every meeting that we had. (yes, I was one of those terrible DC think tank folks meeting in Aspen with the big wigs...)
I hope it wasn't Brookings?
I never got altitude-sick when I was younger. As soon as I hit 30, I was confined to the lowlands.