US nuclear weapons currently deployed in Europe should be returned to US territory, Russian Foreign Minister Sergey Lavrov has said. Steps taken by the US to establish a global missile-defense system undermine strategic stability, the Minister said at the Moscow Conference on Non-Proliferation on Friday. Lavrov referred to attempts to create a missile-defense system by the US and its allies in Europe, the Asia-Pacific region, and elsewhere; bringing its elements closer to the borders of Russia and China, TASS reports.