Northrop X-21A September 12, 2014 3113 × 1427 World War 3: “This is where armor fights!” Idaho National Guard returns to Cold War era ‘Total Force’ warfare training! First female combat mechanic! Pure Armor ecstasy! Me on top of the abandoned and forgotten X-21A, Edwards AFB California, 1985. Written by: Hutchins AAron on September 12, 2014.