RE: Boeing brings GPS ground systems support to U.S. Air Force
What worries me is that as time goes on, orbital space is becomming more and more cluttered with junk. In the vacuum of space, even a paint chip orbiting at 17,000 miles per hour can damage a satellite. So I think a big task that lies ahead for humanity, is bringing used-up satellites back to earth instead of letting the clutter keep on accumulating.