International participants of the FLoC conferences might require a visa to enter the United States. Visit the National Academies Website on information about obtaining a US visa.
Links to United States Embassies and Consulates
Worldwide is at the U.S. Department of State travel site
If you need an official letter of invitation for obtaining a visa, contact Madan Musuvathi with the following details: name (as on passport), affliated organization, and mailing address. Please also specify how you like to be addressed (Mr./Ms./Dr.).