While most people assume, perhaps because of TV shows or movies, that authorities can plug in a serial number and gather all the data about a gun, Mike Bouchard said that actually couldn't be further from the truth.

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As the taxi revved and accelerated, Mike Hammer fingered the gun under his jacket.

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"You can't do a background check if a guy doesn't have a gun to buy, " said Mike Fotia, manager at Duke's Sport Shop in New Castle, Pa.

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Mike Jones is the hired gun executing a new strategy that News Corporation expects will take MySpace back to the top.

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Mike McLelland told the AP that he carried a gun everywhere, even to walk his dog around town, a bedroom community for the Dallas area.

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But Mayor Mike McGinn said there have been "multiple tragic episodes of gun violence" around the city in recent weeks.

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U.S. Rep. Mike McCaul, chairman of the House Homeland Security Committee, said "most likely gun powder" was used in the devices.

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