Russia is hosting a conference on missile defense today in the capital, Moscow.
Reports say Russian officials intend to use computer modeling to show how NATO plans to build an antimissile shield in Europe could undermine Russia's nuclear deterrent.
Ahead of the conference, Ellen Tauscher, the U.S. special envoy for strategic stability and missile defense, said the United States was fully committed to building its system and that it posed no threat to Moscow.
According to Russian officials, the Moscow conference is due to be attended by senior U.S. and NATO officials as well as non-NATO European nations and countries such as China and India.
Russia and NATO agreed in 2010 to seek ways to cooperate on missile defense but have failed to reach a deal.
Based on Reuters reporting