Russian anti-satellite missile test endangers space station crew - NASA | Reuters
GPS Satellites | Lockheed Martin
Air Force: GPS Satellites Vulnerable to Attack
GPS World - The Business and Technology of Global Navigation and Positioning
What on Earth is the Global Positioning System? > U.S. Department of Defense > Story
Brief History of GPS | The Aerospace Corporation
Op-ed | Get the Bullseye Off GPS - SpaceNews
Everything You Need to Know About GPS Tracking – Tracki
A Condensed History of the Global Positioning System (GPS)
GPS - Telecompedia
An F-15 Eagle Once Shot Down a Satellite | Anti-Satellite Weapon
India joined exclusive club with anti-satellite missile test: Here's what it means for the world
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
China and Russia Could Cripple the US With a Space Attack, but the US Is Pushing Back
How to fight a war in space (and get away with it) | MIT Technology Review
GPS Isn't Very Secure. Here's Why We Need A Backup | WIRED
Here's The Only Pilot To Shoot Down A Satellite By A Fighter Jet - Fighter Jets World
GPS: A $1.4 Trillion Economic Engine | RTI
Russia warns it can destroy NATO satellites as White House says it has 'serious concerns' | Daily Mail Online
Do you know how GPS works? - Bareways
How would a military force go about shooting down or otherwise disabling navigation satellites (GPS, Glonass, Beidou, etc.) in the event of a war? - Quora
What Happens If GPS Fails? - The Atlantic
Shot-Down Over Ukraine, Russian Su-34 Fighter Jet 'Shockingly' Found With ' GPS Taped To Its Dashboard'
Why the Military Released GPS to the Public
Putin is holding GPS hostage. Here's how to get it back.
