A B-1 visa is a visitor visa for foreign nationals who seek to enter the United States for temporary participation in business or commercial activities. Typically valid for six months, the B-1 visa is classified as a nonimmigrant document as of 2015.
Foreign nationals who are eligible for B-1 visas include business associates of U.S. firms, executors or owners of U.S. estates and employees attending professional training sessions in the United States. Among other requirements, applicants must show proof of temporary business commitments that must take place in the country, such as property settlements or sales, contract negotiations and professional or scientific conventions. This visa classification also covers some air crew members who must pass through the United States temporarily, such as the staff of deadhead flights.