Gandhi, in recognition of his contributions to the Nation by the promotion of nonviolence. (b) Design and striking For the purpose of the presentation referred to in subsection (a), the Secretary of the Treasury (hereinafter in this Act referred to as the Secretary ) shall strike a gold medal with suitable emblems, devices, and inscriptions to be determined by the Secretary. (c) Smithsonian Institution (1) In general Following the award of the gold medal under subsection (a), the gold medal shall be given to the Smithsonian Institution, where it shall be available for display as appropriate and made available for research. (2) Sense of Congress It is the sense of Congress that the Smithsonian Institution should make the gold medal received under paragraph (1) available for display at other locations, particularly such locations as are associated with Mahatma Gandhi. 3. Duplicate medals Under such regulations as the Secretary may prescribe, the Secretary may strike and sell duplicates in bronze of the gold medal struck pursuant to section 2 at a price sufficient to cover the cost of the bronze medals, including labor, materials, dies, use of machinery, and overhead expenses, and the cost of the gold medal. 4. National medals The medals struck under this Act are national medals for purposes of chapter 51 of title 31, United States Code.