You are walking down the street with a friend. A shot is fired. The two of you duck behind the nearest cover and you pull out your smartphone. A map of the neighborhood pops up on its screen with a large red arrow pointing in the direction the shot came from.

A team of computer engineers has made such a scenario possible by developing an inexpensive hardware module and related software that can transform an Android smartphone into a simple shooter location system.
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As our Congress furiously debates gun control, it’s interesting to see what happened in Australia when they banned certain types of weapons in 1996.

John Howard was prime minister of Australia from 1996 to 2007, and in the January 17th edition of the New York Times, he writes about his own experience with gun reform, following a horrific massacre in that country on April 28, 1996, when a psychologically disturbed man named Martin Bryant used a semiautomatic rifle and a semiautomatic assault weapon to kill 35 people in a murderous rampage in Tasmania. Gun ownership is extremely high in Australia, especially in that part of the country.
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Linda Howe reports that on May 17, 2012, an FBI and Homeland Security "Roll Call Release" for Police, Fire, EMS and Security Personnel was distributed on the internet. The release states that "terrorists may seek to emulate overseas attacks on theaters here in the United States because they have the potential to inflict mass casualties and cause local economic damage." Was the Aurora shooter James Holmes, like army psychiatrist Major Nidal Hassan, who killed 12 soldiers and one civilian at Fort Hood in 2009, a jihadist who was "turned" by the internet?
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