To check if you need a visa to travel to the United States, please visit the Visa Waiver Program (VWP) website. The VWP allows for 90-day stays with an approved ESTA.
If your country is not listed, you must apply for a visa at a U.S. Embassy or Consulate.
Lawrence Berkeley National Lab can provide an official invitation letter to participants requiring it for obtaining a visa. Please send your request to [email protected].