NASA’s Sector 33 requires players to keep imaginary pilots and their airliners a safe distance in the sky from each other using math and problem-solving skills. In the game, the player acts as an air traffic controller by guiding airplanes through a sector of airspace spanning Nevada and California.

It is free of charge for Apple iPhone and iPad devices. Visit www.nasa.gov/centers/ames/Sector33/tiO/index.html for download information.

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