Most international attendees visiting the United States will need to apply for a visa through the U.S. Department of State.

Visa applications are now subject to a greater degree of scrutiny than in the past. The visa application process can take several weeks. Please allow enough time for your application to be processed: Visa wait time

It is important to thoroughly review all information on the specific Embassy's Consular Section website for local procedures and instructions, such as how to make an interview appointment.

Citizens from Visa Waiver Program countries can come to the U.S. without a visa if they meet certain requirements. Consult the Visa Waiver Program for a list of countries participating in the waiver program.

A letter of invitation may be required as part of your visa application process. Personalized letters of invitation can be printed with the program chairs electronic signature by clicking on the following link:

Personalized Letter of Invitation