A man owning 92 guns i met in USA!

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Feb 14th this year,i flied to USA for a international fair in Indianapolis.I was so exciting in this trip for that was my first time to vist USA(also the first time to go abroad).I found many interesting things during this trip. In a talk about the guns-holding in USA, our driver,a 72years old man, told us that he has 92 guns at home! I do know that American have the freedom to own guns long long ago,but i can not believe that a man has 92 guns himself! During my one week trip,a serious gun attack case happened in Northern illinos University! How do you think of the freedom to hold guns in USA?