Russia has strongly objected to the plan, describing it as a threat to Russian national security.
Some of the United States' European allies in NATO, such as Germany, have also raised questions about the plan.
The United States says the shield is not directed against Russia, but could be used to shoot down a small number of missiles that could be fired by Iran or another state.
U.S. experts involved in the missile-shield plan are expected to take part in the talks with Russian and NATO representatives.
(compiled from agency reports)
A U.S. official discusses the security threats that Washington feels justifies a missile-defense program. more
Moscow has been uncompromisingly hostile to the U.S. missile-defense proposal. more
Russian President Vladimir Putin (left) with EU foreign policy representative Javier Solana in Sochi in May 2006 (epa)
A POLICY OF APPEASEMENT? Ralf Fuecks, head of the Heinrich Boell Foundation and a Green Party activist, spoke at RFE/RL's Prague broadcast center about the EU's complex relations with a resurgent Russia. RFE/RL President Jeff Gedmin moderated the discussion.
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