Russia is violating a key nuclear arms control agreement with the United States and continuing to refuse to allow inspections of its nuclear facilities, a State Department spokesperson said Tuesday. ”And though a US intelligence assessment in November suggested that Russian military officials discussed under what circumstances Russia would use a tactical nuclear weapon in Ukraine, the US has not seen any evidence that Putin has decided to take the drastic step of using one, officials told CNN. Asked if Moscow could envisage there being no nuclear arms control agreement between the two nations when the extension of the 2011 New START Treaty comes to an end after 2026, Ryabkov told the Russian state news agency RIA Novosti on Monday: “This is a very possible scenario