Entry to the United States have many requirements and are currently subjected to a greater degree of scrutiny. Most foreign nationals must be able to obtain a visa through the State Department prior to traveling into the United States. Please enter the following website to obtain up to date information on all the requirements: https://travel.state.gov/content/travel/en/us-visas.html. It is recommended that participants start their Visa applications at least 90 days before travelling.
Citizens of countries that participate in a Visa Waiver Program typically only require registration in the Electronic System for Travel Authorization (ESTA). To register, please click on the following link: https://esta.cbp.dhs.gov/. To verify whether or not your country of citizenship participates in the Visa Waver Program, please visit this link: https://travel.state.gov/content/travel/en/us-visas/tourism-visit/visa-waiver-program.html.
Many embassies require the traveler to present an invitation letter from the organizing committee as registration verification. Please contact Daniel Enderich for support.