330-CFD-DN-ST-88-02592: A view of the Mark 45 5-inch/54-caliber gun on the stern of the destroyer USS Thorn (DD 988) as the ship approaches the Bridge of the Americas on the Pacific Ocean side of Panama. The THORN is participating in Exercise UNITAS XXV, 9/1/1984. PHCS Kirby Harrison, USN.   OPA-NARA II-2015/12/24).
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