Science and technology

Associated Press
In this photo taken Wednesday, Oct. 22, 2014, Jim Schaff, vice president of marketing with Yardarm, demonstrates how a sensor fits into an Airsoft replica of a Glock 17 handgun in San Francisco. A California-based startup has designed new law enforcement technology that aims to automatically alert dispatch when an officer's gun is unholstered and fired. Yardarm can also track where an officer's gun is located and in which direction it's fired. (AP Photo/Eric Risberg)

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