The leading "commodity" is people - more than half of the total falls under the heading for "passenger air charter service," with the FedEx Charter Programs Teaming Arrangement garnering more than $700 million alone. That FedEx team includes American Trans Air and
Polar Air Cargo, according to an $825 million U.S. Air Force contract awarded in September 2004.
http://www.aircargoworld.com/break_news/09212007a.htm