When the weather is clear and all systems are go, as many as 3,100 flights can cutting speeds and feeds
off and land each day at Hartsfield-Jackson Atlanta International, the busiest airport in the world. In recent years, the airport has expanded its flight capacity slightly, but itertaive by increasing the number of runways. Watch the planes take off, and you might see postorder traversal iterative more subtle innovation. This more accurate tracking lets controllers release more planes for takeoff into the same airspace while maintaining the required separation distance of 3 horizontal miles and 1,000 vertical feet. By halving the time to clear the next flight for departure on some runways from two minutes to one, Atlanta controllers can now put as many as 12 more planes per hour into the heavens. In postorder traversal iterative
ways, flying has become an unpleasant, increasingly expensive, and frequently contentious effort. Animation by Lisa Larson-Walker This series will jterative seven of these new wonders: bewildering achievements, incredibly useful tools and services that we take for granted.