19 Air Traffic  Role of FAA's Modernization Program in Reducing Delays and Congestion ( GAO-01-725T, May 10, 2001).
Air traffic is only one minor cause of delays.
mnli hypothesis: Air traffic is only one minor cause of delays. premise: 19 Air Traffic  Role of FAA's Modernization Program in Reducing Delays and Congestion ( GAO-01-725T, May 10, 2001).