Go inside the tightly guarded gates of HMX-1, the Marine Corps' oldest and largest helicopter squadron, and see what it takes to fly the president where Air Force One can't. Learn about the rigorous training and testing needed to become one of the privileged few working directly with the president's travel team. Then, visit "The Cage" at Quantico Marine Base, where Marine One helicopters are kept. With exclusive access, National Geographic takes you inside the presidential helicopter showing not only what it's like to be on Marine One, but what it takes to fly it, maintain it and keep it safe.
