how many types of usa visa are there
Visa policy of the United States While there are about 185 different types of visas,[5] there are two main categories of U.S. visas:
List of United States military bases The United States is the largest operator of military bases abroad, with 38 "named bases"[note 1] having active-duty, National Guard, reserve, or civilian personnel as of September 30, 2014. Its largest, in terms of personnel, was Ramstein AB, in Germany, with almost 9,200 personnel.[1][note 2] The Pentagon stated in 2013 that there are "around" 5,000 bases total, with "around" 600 of them overseas.[2]