U.S. air traffic congestion has steadily increased over the last decade, with record levels of delays at our busiest airports.  The U.S. now has the world’s worst air traffic congestion: more than 1 in 5 flights departing our busiest airports are delayed, and 48% of delays in our 5 largest metropolitan areas are caused by our outdated aviation system. This problem will get worse in the future, as air travel is projected to double or even triple by 2025.