Do I need a passport if I am traveling domestically by air in the USA or is just regular ID OK?
I haven't flown before so I am not sure of what passport rules apply and how passport control USA works with citizens. I have a few weeks before my trip so I have time to get a passport if need be, but I would prefer not to have to. I don't travel much and a passport is rather expensive, especially if you are not going to use it.
Also, if I don't have a passport is there a separate line I should be in? I want to know what to look for once I get to the airport.