When Soviets Launched Sputnik, C.I.A. Was Not Surprised - The New York Times
Remembering Sputnik - The satellite that began the Space Race - NASASpaceFlight.com
Sputnik Rocket: Reaching orbit, in style! | The Space Techie
Sputnik | Satellites, History, & Facts | Britannica
Sputnik 1957 hi-res stock photography and images - Alamy
File:Sputnik 1.jpg - Wikimedia Commons
How Sputnik 1 launched the space age
The Sputnik 1 Launch: The First Artificial Satellite To Enter Earth's Orbit | Mach | NBC News - YouTube
Russia Launched Sputnik on October 4 1957
Sputnik 1 (PS-1 #1) - Gunter's Space Page
Sputnik and the Space Age | National Air and Space Museum
Sputnik 1! 7 Fun Facts About Humanity's First Satellite | Space
Sputnik (rocket) - Wikipedia
60 years ago, Soviets launch Sputnik 3 | NASA
Sputnik at 60: Read Original 1957 Coverage of Launch | Time
Sputnik design
Sputnik (rocket) - Wikipedia
Soviets Launch Sputnik, 1957 | Origins
4 October 1957 – Sputnik 1 – Explaining Science
The Rocket That Launched Sputnik and Started the Space Race
What was Sputnik One? - Universe Today
How Sputnik Worked
