About Air National Guard Units (Wikipedia Record):
The Air National Guard (ANG), also known as the Air Guard, is a federal military reserve force of the United States Air Force (USAF), as well as the "air militia" of each U.S. state, the District of Columbia, the Commonwealth of Puerto Rico, and the territories of Guam and the U.S. Virgin Islands. It, along with the Army National Guard component of each state, district, commonwealth or territory, makes up the National Guard of each region as applicable. The ANG and the United States Air Force Reserve constitute the two air reserve components of the USAF.
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