Should it be lowered to 18?
You can vote at 18 but you can't drink a beer or have a Jack and coke. You can detect IED's and kill the enemy at 18, but you can't have a beer or a nice glass of wine or 10. You can go to college under 21 and see to your laundry, eating, homework, getting to class and getting up in the AM, but you better stay away from the 2,587 bars in the neighborhood and darn well best stay away from the 7,491 keg parties on any given night of the week.
To me, this sort of non sense breeds cynicism that is far more harmful to our society than being able to drink at 18.
So, what we we, the people, say?