The owner, who asked not to be identified because of concerns about his privacy, turns on the lights in his underground shelter in an undisclosed Southern California city, on Dec. 16. Jae C. Hong/AP hide caption
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nuclear war
Russian President Vladimir Putin delivers his annual state of the nation address in Moscow on Thursday. Alexander Nemenov/AFP via Getty Images hide caption
Russian missiles roll in Red Square in Moscow. President Vladimir Putin has warned that he wouldn't hesitate to use nuclear weapons to ward off Ukraine's attempt to reclaim control of its occupied regions. AP hide caption
This is the mushroom cloud of the first atomic explosion at Trinity Test Site, N.M., on July 16, 1945. AP hide caption
Fallout shelter signs, like this one, still hang on buildings around the U.S. Travis S./Flickr hide caption
As Rhetoric Ramps Up, Are Today's Kids Worried About Nuclear War?
The Cheyenne Mountain Complex was completed in the mid-1960s. The tunnels extend thousands of feet into Cheyenne Mountain in Colorado Springs, Colo. Courtesy Simon & Schuster hide caption
In The Event Of Attack, Here's How The Government Plans 'To Save Itself'
