http://en.kremlin.ru/events/president/news/70565

“We know the truth. We are aware of the fact that certain types of US nuclear weapons are reaching the end of their service life. In this regard, we know for certain that some politicians in Washington are already pondering live nuclear tests, especially since the United States is developing innovative nuclear weapons. There is information to that effect.

Given these circumstances, the Defence Ministry and Rosatom must make everything ready for Russia to conduct nuclear tests. We will not be the first to proceed with these tests, but if the United States goes ahead with them, we will as well. No one should harbour dangerous illusions that global strategic parity can be disrupted.“

via consortiumnews.com