established under title 10 and title 32 of the u.s. code, the air national guard is part of the state national guard and is divided up into units stationed in each of the 50 states, the district of columbia, the commonwealth of puerto rico and the two u.s. territories. each state, the district of columbia and the commonwealth of puerto rico have at least one air national guard wing level unit with a flying mission, while the air national guard in guam and the u.s. virgin islands are strictly non-flying support organizations at the group or squadron level.