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Bartels was among the skilled tradespeople who worked at the World Trade Center site, using his expertise in steel and mechanical work during a defining moment for New York City. Hear his story as he takes a look back on that day!

<p>Bartels was among the skilled tradespeople who worked at the World Trade Center site, using his expertise in steel and mechanical work during a defining moment for New York City.&nbsp;Hear his story as he takes a look back on that day!</p>