The travel.state.gov site has information about obtaining a visa for those traveling to the United States. The site also has links to websites for U.S. embassies and consulates worldwide. These websites have very helpful information about procedures, timelines, communities served, required documentation, and fees. Please note: International registrants should be particularly aware and careful about visa requirements and should plan travel well in advance. Visa letters are requested during the registration process on the event registration form. Requests for letters are sent directly to the Registration Chair after registration has been completed (including payment). Registration letters will be sent via email in the order they are received from the local host, The University of Texas at Dallas.