All recent U.S. efforts after the conclusion of the 2010 New Strategic Arms Reduction Treaty (New START) to move ahead on bilateral nuclear arms reductions with Russia have stalled over Russian concerns regarding the capabilities of the European Phased Adaptive Approach, as the Obama administration's missile defense policy in Europe is formally known, and its effect on Russian nuclear retaliatory potential.
Since the early stages of the phased adaptive approach, Russian officials have cited it as an obstacle to further nuclear arms reduction. Last March, however, U.S. Secretary of Defense Chuck Hagel announced a restructuring of the approach, canceling the planned implementation of its fourth phase, which had prompted the strongest Russian complaints. The key feature of that phase was the deployment of the Standard Missile-3 (SM-3) IIB interceptors in Poland. The SM-3 IIB, with a planned velocity of 5.5 kilometers per second, would have had the ability to fly further and faster than any other missile in the system....
Read the entire article online: http://www.armscontrol.org/act/2013_11/Missile-Defense-Against-Iran-Without-Threatening-Russia
Sankaran, Jaganath. “Missile Defense Against Iran Without Threatening Russia.” Arms Control Today, November 2013
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