A citizen of any foreign country generally must have a visa to enter the United States. There are two types of such visas: a nonimmigrant visa intended for temporary stay as well as an immigrant visa for permanent residence in the United States. The nonimmigrant visa, often called a “visitor” visa, comes in two varieties, one intended for those coming to the U.S. momentarily for business (B-1) and people coming to the country for pleasure or hospital treatment (B-2).
The B-1 visa is intended for citizens of foreign countries who want to take part in work-related business in the United States for several days. The B-1 visa allows visitors to consult with work associates in the country and enter in the U.S. for the scientific, educational, professional, or business convention, settle an estate, negotiate a contract, or look at the U.S. for a conference on specific dates.