Please check the latest regulations for entry into the United States. Depending on your nationality you may be able to enter the United States under the visa waiver program or you might have to apply for a visa. Please allow plenty of time for the visa application process. Information about visa regulations is provided by the United States National Academy of Sciences and the U.S. Department of State. A step-by-step outline of the visa application procedure is given here. You can find the consulates and embassies of the United States in your country of origin in this list. If you need an invitation letter please email us.