International participants who will present an oral talk, poster, or an exhibit and whose country does not participate in the U.S. Visa Waiver Program may request a letter of participation from the LOC at email@example.com for a B1 Visa for Business in a timely manner. When requesting a letter of participation, please provide presentation information and full contact information (telephone and mailing address).
Others who do not meet the above criteria, but need a visa for entry may apply for the B2 Visa for Tourism-Pleasure. No support letter from the LOC is required.
For more information regarding travel to the U.S. please visit Travel.State.Gov or consult with the U.S. embassy of your country.