GPS rules everything. A new satellite launch keeps a big upgrade rolling - CNET
GPS - Telecompedia
Russia warns it can destroy NATO satellites as White House says it has 'serious concerns' | Daily Mail Online
NTS-3, Aiming To Improve On GPS, Starts Integration Tests In August - Breaking Defense
Global positioning system is our best navigation network, but this may change in five years - ABC News
Op-ed | Get the Bullseye Off GPS - SpaceNews
After GPS was invented, President Ronald Reagan wanted it to be available to all people for their own use. When a Korean Airliner was shot down for invading. - ppt download
Lesson 1: The GPS Signal
A Condensed History of the Global Positioning System (GPS)
What Happens If GPS Fails? - The Atlantic
GPS: A $1.4 Trillion Economic Engine | RTI
America Can Protect Its Satellites Without Kinetic Space Weapons - War on the Rocks
An F-15 Eagle Once Shot Down a Satellite | Anti-Satellite Weapon
GPS Satellites | Lockheed Martin
Air Force: GPS Satellites Vulnerable to Attack
Shot-Down Over Ukraine, Russian Su-34 Fighter Jet 'Shockingly' Found With ' GPS Taped To Its Dashboard'
Global Positioning System - Wikipedia
Satellites like Elon Musl's Starlink are the next front in space war
Anti-satellite weapons: History, types and purpose | Space
Do you know how GPS works? - Bareways
Six ways satellites make the world a better place
GPS Isn't Very Secure. Here's Why We Need A Backup | WIRED
Anti-satellite weapon - Wikipedia
China and Russia Could Cripple the US With a Space Attack, but the US Is Pushing Back
Why the Military Released GPS to the Public
