Honoring the Mohawk Iron Workers, $1 Native American series coin. Important contributors to bridge and skyscraper building since 1886, including the Chrysler building, the Empire State bldg., and World Trade center. Helped in the dangerous job of the WTC cleanup after 9/11. Manganese-brass, 26.5 mm. (ref. http://www.usmint.gov/mint_programs/nativeAmerican/?action=2015NADesign)