design to the 23d Headquarters, Special Troops, known as the Ghost Army , collectively, in recognition of its unique and incredible service during World War II. (b) Design and striking For the purposes of the award referred to in subsection (a), the Secretary of the Treasury (in this Act referred to as the Secretary ) shall strike the 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 in honor of the Ghost Army, the gold medal shall be given to the Smithsonian Institution, where it will be available for display as appropriate and available for research. (2) Sense of congress It is the sense of the Congress that the Smithsonian Institution should make the gold medal awarded pursuant to this Act available for display elsewhere, particularly at appropriate locations associated with the Ghost Army, and that preference should be given to locations affiliated with the Smithsonian Institution. 4. Duplicate medals The Secretary may strike and sell duplicates in bronze of the gold medal struck under section 3, at a price sufficient to cover the costs of the medal, including labor, materials, dies, use of machinery, and overhead expenses. 5. National medal The gold medal struck pursuant to this Act is a national medal for purposes of chapter 51 of title 31, United States Code.