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    An up-close look at the AR-15

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An up-close look at the AR-15

CNN's Gary Tuchman goes to a shooting range to take an up-close look at an AR-15-style rifle with retired Lieutenant General Mark Hertling.

An up-close look at the AR-15

CNN's Gary Tuchman goes to a shooting range to take an up-close look at an AR-15-style rifle with retired Lieutenant General Mark Hertling.