If I may, there were a lot of people who worked on airplanes before the First World War. You had a number of them. There were probably hundreds of them. The Wrights happened to be the ones who got it—and it's wonderful, although one has to.... Being very innovative, they got it right. But they did not invent the airplane; they invented a control system.
There was certainly a great deal of work being done. Most of the people who developed airplanes before the First World War made little hops, a bit like what Mr. Langley did. They made little hops or none at all, and they sort of got disappointed and pulled out of it. So most aircraft designs are never produced; they remain on paper. So there is certainly an aspect of private enterprise.
As far as the United States is concerned, definitely.... With some government assistance in some cases, through contracts, or through access to research facilities, the equivalent of our National Research Council for wind tunnel research.... But as far as other countries are concerned, there is much more government involvement.