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Pi Day celebrations kick off with a 'pi in the sky'

Maximum PC: With everybody's favorite holiday around the corner -- Pi Day, of course -- celebrations have already begun to take place around the US. Sky gazers in Austin, Texas, may have noticed something interesting happening with skywriting airplanes on Thursday -- namely, a "pi in the sky." To celebrate Pi Day and honor the great mathematical constant of 3.141592 etc., AirSign aircrafts took to the skies to attempt to spell out the infinite pi sequence across 100 miles of sky in Austin.

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