The U.S.-Russian confrontation over Ukraine, which is threatening to undermine current bilateral talks on North Korea, Iran, Syria and Palestine, is also in danger of triggering a nuclear fallout.
Reactions have been mixed to President Barack Obama's call for greater nuclear arms reductions in the United States and Russia, made during his speech in Berlin on Wednesday.
When the 193-member U.N. General Assembly (UNGA) holds is first-ever high-level meeting on nuclear disarmament next September, there is little or no hope that any of the nuclear powers will make a firm commitment to gradually phase out or abandon their lethal arsenals.