A fair bit of misinformation here about GPS.
1. The US GPS system was not in any way switched off during the 11 September 2001 period, nor was SA altered in any way.
2. WAAS has now been approved in the USA, and GPS receivers are now available that enable approaches to CAT I minimums, depending on the airport, and the approved specific procedure.
The USA acts...the Europeans just look on in amazement, and continue to cast stones, simply because they didn't think of it first
Par for the course.