An impenetrable nation situated on a fortified landmass, the United States is the closest revival of ancient Sparta that modernity has witnessed. Therefore, the political heart that is Washington D.C. must be protected at all costs. With high-security areas to safeguard, like The Pentagon, The White House, and the Capitol, it is no wonder that air traffic is outlawed here. In 2014, a small craft pilot strayed into the zone by accident and was escorted by two F-16 jets toward North Carolina. Still, the Capitol was evacuated as an assurance, proving that the United States is territorial even when its own citizens wander across the line.