Supreme Leader's Bunker Location in MW4 DMZ

The Supreme Leader has a secret bunker containing Legendary loot in MW4 DMZ, but to open it, you are going to need to obtain the Supreme Leader's Bunker Access Card by completing the Story Mission: Operation Iron Citadel. Once you have it, you can find the Supreme Leader's Bunker at the Air Base, but this requires taking a specific path that we'll showcase below, and fast, so you can avoid potential hostile teams who seek the same loot, or worse, your death.