As Mrs767er said, very easy to do!

I actually had to do this in March.

Flew to MSP on the first flight in the morning, took the light rail downtown, dropped my passport off and paid the fee, went to lunch with a friend, came back at 2pm and picked it up, rode light rail back to MSP, flew back home by 5pm.

I brought a fake stand by listing but they did not need it....

The toughest part is the fee, which as she said, was free until a couple of years ago.....