lot of 30 1970s vintage, 35mm photo slides of airplane, airport, fighter jets, hovercraft

Lot of about 30 assorted, 1970s vintage, 35 mm photo slides. These slides are mostly shots of airplanes and airport, US Air Force fighter jets and airliners, photos the of the airplanes and perimeter fence at a desert airbase (Tucson, Arizona, we think) as well as some photographs of a large hovercraft. These slides measures about 2" square.