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The RT-2PM Topol (Russian: РТ-2ПМ Тополь ("Poplar"); NATO reporting name SS-25 Sickle; GRAU designation: 15Ж58 ("15Zh58"); START I designation: RS-12M Topol) is a mobile intercontinental ballistic missile designed in the Soviet Union and in service with Russia's Strategic Missile Troops. As of 2014, Russia planned to replace all RT-2PM ICBMs with versions of Topol-M.