U.S. Fears GPS Competitors

"Until recently, a GPS device could determine its location to the nearest ten metres or so. It is reported that the American military improved this to around three metres during the Iraq war. But Galileo is designed to be accurate to within just one metre. It is also expected to overcome GPS’s lack of accuracy in...built-up areas...America is planning to improve its satellite-navigation system further: next year, it will start launching a second generation of GPS satellites, which will offer greater accuracy for civilian users..."