A 39-year-old firing-range instructor was killed Monday while showing a 9-year-old girl how to use an Uzi submachine gun. Charles Vacca's death at the Last Stop outdoor shooting range in White Hills, Arizona, has raised questions about allowing young children access to such weapons at firing ranges. SHOULD YOUNG CHILDREN HANDLE FIREARMS LIKE UZIS? Gun experts say what types of firearms a child can handle depends largely on the strength and experience of the child — but the notion of giving a 9-year-old a fully automatic Uzi made many queasy.