For visitors traveling to the convention from another country: Be sure to check the travel requirements from your country carefully, and visit the US State Department website for more information.
Countries that participate in the visa waiver program, such as those in Europe, must take another step via an electronic filing (ESTA) in order to enter the U.S.
If you live in a country where visa interviews are required, you may well be offered an interview date after the convention. If that happens, let us know as soon as possible.
If you already have an entry visa for the U.S., triple check that all is in order and bring printed paperwork with you. If you have a passport other than a U.S. passport, make sure it is valid for at least six months beyond your stay in the U.S.