Russia suspends nuclear agreement, ends uranium research pact with United States

http://www.reuters.com/article/us-russia-usa-nuclear-uranium-idUSKCN12521J

Russia scraps plutonium agreement with US

http://www.presstv.ir/Detail/2016/10/06/487885/Russia-US-plutonium-agreement

Why Russia's withdrawal from the plutonium deal is worrying

http://www.russia-direct.org/analysis/why-russias-withdrawal-plutonium-deal-worrying