The past several years have seen Washington partially losing its ability to develop nuclear warheads, Dmitry Stefanovich of the Moscow-based Institute of World Economy and International Relations with the Russian Academy of Sciences, told Sputnik.

The past several years have seen Washington partially losing its ability to develop nuclear warheads, Dmitry Stefanovich of the Moscow-based Institute of World Economy and International Relations with the Russian Academy of Sciences, told Sputnik.