Air National Guard in Federal service: call

§ 8500. Air National Guard in Federal service: call Whenever— (1) the United States, or any of the Territories, Commonwealths, or possessions, is invaded or is in danger of invasion by a foreign nation; (2) there is a rebellion or danger of a rebellion against the authority of the Government of the United States; or (3) the President is unable with the regular forces to execute the laws of the United States; the President may call into Federal service members and units of the Air National Guard of any State or Territory, Puerto Rico, the Canal Zone, or the District of Columbia in such numbers as he considers necessary to repel the invasion, suppress the rebellion, or execute those laws. Orders for these purposes shall be issued through the governors of the States, the Territories, Puerto Rico, and the Canal Zone, and, in the District of Columbia, through the commanding general of the National Guard of the District of Columbia.