In the Cold War era, a top secret missile base housing multi-megaton Titan missiles aimed at the USSR lay beneath Arizona sands. Today, the Titan Missile Museum near Sahuarita is a National Historic Landmark that tells the story of those dark and fear-filled days.
We have just a little bit about the Titan Missile Museum and the nearby Pima Air and Space Museum, but if you go to Joel D Valdez Main Library in downtown Tucson, you can look at their catalogs here: http://bit.ly/Arizona-Aerospace
Even better, take a day trip out of Tucson and go see these museums for yourself! Make it a Summer Reading activity, or just to understand more about how the world used to be.
If the Cold War history intrigues you, there is a lot to learn from these resources: http://bit.ly/Cold-War
The image of the Titan warhead was made available courtesy of photographer Sam Howzit through a Creative Commons license: http://www.flickr.com/photos/aloha75/6110164118/