The NSA has ears that never quit. The eavesdroppers par excellence want to know what people are saying, 24/7. What's the history of the National Security Agency, from its founding to its present status as the world's most efficient snoop?
Engineers have built better prosthetics for the 16 survivors who lost limbs when bombs exploded at the Boston Marathon.
Four dry-ice bombs were discovered at the Los Angeles International Airport recently, two of which exploded. How are they made?
Technologies that can improve lives can also take them away.
Facebook, YouTube, Twitter and Reddit lend a hand in catching crooks, but also bring the story closer to home. ->
In the aftermath of tragedy, hoaxes go viral because the public rarely makes the distinction between conspiracy and misinformation.
Using about $1,000 worth of radio equipment, a person could fake an airplane's signal to an air traffic controller.
A new security machine scans bottles to determine if the contents are safe to take on the plane.
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