In this July 2, 2017 photo, Ian Usry, a former jet engine mechanic with the U.S. Navy, who works at the Knoxville Gun Range, instructs a visitor to the range, in Knoxville, Tenn. (Adam Taylor Gash/Tennessee Ledger via AP)
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In this July 2, 2017 photo, Ian Usry, a former jet engine mechanic with the U.S. Navy, who works at the Knoxville Gun Range, instructs a visitor to the range, in Knoxville, Tenn. (Adam Taylor Gash/Tennessee Ledger via AP)
