re: Fastest way to renew a passport?

We went to the post office here in Baton Rouge and got there at 4. They are supposed to quit taking people at 5 but the lady was nice and locked the doors and let us stay until we were processed. Got out of there about 5:30 Was told it would take 4-6 weeks and my Passport came in the mail yesterday, which has only been about 3 weeks.