What has been a feature of the skies in Albuquerque, New Mexico, USA, for over a week in early October since 1972?

Question

What influential and enduring company did the 22 year old Paul Allen co-found in April 1975 in Albuquerque, New Mexico, USA?

Answer 1

Hot air balloons
The Albuquerque International Balloon Fiesta attracts up to 600 multi-coloured and many-shaped hot air balloons in a 9 day celebration. The number of registered balloons reached a peak of 1,019 in 2000, prompting the Balloon Fiesta Board to limit the number to 750 starting in 2001. The limit was lowered to 600 in 2009.