Wind power: It's all about the altitude?

A Flying Electric Generator (FEG) 15,000 ft above the Earth?

Is the key to America's energy independence FEG's - basically flying windmills? That's what SkyWindPower believes.

"Our calculations show that by reserving less than one four-hundredth of U.S. air space, located at relatively remote locations not on airway routes, all of America's electrical energy needs could be met. That is considerably less airspace than is already restricted for other purposes, primarily military," reports CNN.