“This is a very serious matter which we have attempted to address with Russia for some time now,” a senior administration told NBC News on Monday night.
For more details visit http://www.nbcnews.com/news/us-news/u-s-accuse-russia-breaking-landmark-nuclear-treaty-n167191
For more details visit http://www.nbcnews.com/news/us-news/u-s-accuse-russia-breaking-landmark-nuclear-treaty-n167191
