Funny, I just saw this post yesterday by DARPA about preventing GPS issues: <a href="http:&#x2F;&#x2F;gazette.com&#x2F;defense-department-researchers-push-plan-aimed-at-avoiding-worldwide-gps-meltdown&#x2F;article&#x2F;1569000" rel="nofollow">http:&#x2F;&#x2F;gazette.com&#x2F;defense-department-researchers-push-plan-...</a>