If you click on the title of this post, it'll take you to a tribute I wrote last year for Fred Cox, Jr., a friend of a friend of mine who died in the twin towers.
It doesn't matter where you were on 9/11 in 2001 when all the world stood still.
Chances are you remember exactly what you were doing, how your heard, and how you felt as you found out that those two planes had slammed into the World Trade Center, then the Pentagon, then that field in Pennsylvania.
If you do nothing else today, reflect upon what happened 6 years ago, and think of those 2,996 who died that day, and the many since in wars and other terrorist attacks.
Your politics aren't important today, just keep the memories of those alive by pausing and giving them some honor in your day.