Can I renew my US passport in 24 hrs?
Not anymore. Back in the day (pre-9/11) you could. In the mid-90s I had to do it. I went to the Miami office and got the expedited process. It was same day then. No longer. Today, its a whole new ball game. The fasted expedited passport is 72 hours (3 business days) and only for life-or-death emergencies. You can see here the new expedited times: Get a Passport in a Hurry