A visas are issued to representatives of a foreign government traveling to the United States to engage in official activities for that government. A visas are granted to foreign government ambassadors, ministers, diplomats, as well as other foreign government officials or employees traveling on official business (A-1 visa). Certain foreign officials require an A visa regardless of the purpose of their trip. The A visa is also granted to immediate family members of such foreign government officials, defined as "the principal applicant's spouse and unmarried sons and daughters of any age who are not members of some other household and who will reside regularly in the household of the principal alien" (A-2 Visa) and which "may also include close relatives of the principal alien or spouse who are related by blood, marriage, or adoption who are not members of some other household; who will reside regularly in the household of the principal alien; and who are recognized as dependents by the sending government (A-3 Visa).