For a tourist visa, they are normally given a six-month visa, which can be extended in some cases for an additional six months. In this category of visa, the applicant’s spouse and children must independently qualify for the B-2 visa.
Questions on visa application procedures and visa ineligibilities should be made to the American consular office abroad by the applicant. If inquiry concerns a visa case in progress overseas, one should first contact the U.S. Embassy or Consulate handling his or her case for status information.
A visa does not guarantee entry into the United States. Immigration authorities have the authority to deny admission and can determine the period for which the bearer of a visitor visa is to be authorized to remain in the United States. At the port of entry, an Immigration official must authorize the traveler’s admission to the U.S. At that time the Form I-94, Record of Arrival-Departure, which notes the length of stay permitted, is stamped. Visitors intend to stay beyond the time indicated on their Form I-94 must contact the USCIS to request Form I-539, Application to Extend status. The decision to grant or deny a request for an extension of stay is made solely by the USCIS.