I realize that the iskander is a conventional short range ballistic missile, but given the numbers that Russia will be fielding them in (lots if I'm not mistaken) why is Moscow even concerned about the dozen or so interceptor missiles planned for the region that 'might' be able to intercept it?
Furthermore, Russia already has an answer to the US missile shield, its called the RT-2UTTH Topol M ballistic missile.
RT-2UTTH Topol M - Wikipedia, the free encyclopedia