The term 'Air Menace' refers to the MIG, a Soviet-built fighter jet used by the Soviet Union during the Cold War. The MIG was a powerful and versatile aircraft that was used in many conflicts, including the Vietnam War. It was also used by other countries, such as North Korea and China. The MIG was a formidable opponent in aerial combat, and its presence in the skies was a constant reminder of the potential danger posed by the Soviet Union.