You will need two photographs of yourself, proof of U.S. citizenship, and a valid form of photo identification such as a driver's license.
Many facilities will have a person on-site who can take the pictures for you (for a fee), so the pictures may not be necessary to bring yourself.
You will also need to pay the processing fees. You can find a list of fees in the related links section.
a passport
No, you do not need a passport just a form of photo ID.
No, for domestic flights, you will need a form of photographic ID, not necessarily a passport.
If your travelling from the U.K. then you don't need a passport but some form of I.D. is reccommended. If your from Europe then you need a passport to get into Ireland. Outside of Europe then i think you need to apply for a visa and bring your passport.
If you are form Australia than no need to passport to travel < a href=http://www.cruiseeasy.com.au/>cruise Australia.
If you are American, European or Canadian, it's all you need, besides some money and vague notions of Spanish; if you are from any other country besides those I just mentioned, you also need a visa.
A passport.
No where in the Caribbean is owned by the US ( besides the Us Virgin Islands and Puerto Rico) So therefore you need a passport to get to most places in the Caribbean.
No, but you will need some form of valid photographic ID (a passport is ideal).
If you have lost your passport, you will need to fill out Form DS-64. It can be obtained from any Passport Agency, or you can print it from an online web site.
No - but some form of ID is essential
You need some form of recognized photo ID.