FedEx founder Frederick Smith and Delta CEO Richard Anderson keynoted an aviation summit and commented that airlines and airports are hubs of economic activity and that the U.S. is still the leader in aviation. However, Smith added that aviation "has reached a point where it is a bit taken for granted." At a different conference panel, Anderson sparred with ACI-NA President Greg Principato over financial and control issues. Principato claimed that airlines want to limit competition and control airports. "Rents and landing fees have a tremendous effect on our cost structure. We're always looking to find the most efficient providers of high quality services," Anderson said. "Airports are monopolists. You can't decide to not go to that airport if you want to go to Hartford. They're municipal monopolies. We're always doing our best to keep rates and charges below inflation."