Pro-gun control people like to ask 'Are you in a militia?' Now, Amendment II doesn't say '...and no one else should have guns', but they almost have a point. But that they have to ask shows their ignorance: I'm a 24-year-old American male. I'm legally required to be in a militia.
I don't want to be. I don't get paid for it. It's not very well-regulated like the National Guard, but I'm in it. I was legally coerced into joining. (They very rarely prosecute you these days, but it's still illegal for me to not sign up, and various nice things to depend on it.)
I don't have or particularly want a gun (though I want the right).
But, yes, I'm in a militia. Until May 20, 2007.
(Almost done with my compulsory military service, and the closest I've come to the military is helping backstage at a ballet performance on base. Whew!)