In combative comments that took the U.S. side aback during a photo session, Putin criticized Bush's pet project and threatened to pull out of a Cold War-era treaty that limits intermediate-range missiles.
Turkey -- now a NATO member and a key U.S. ally in the war on terror -- accepts Armenians were killed but calls it a massacre during a chaotic time, not an organized campaign of genocide.
"Events have triggered more detailed planning for the curtailment or closure" of access to Turkey, one official said. The key issue is to find ways to ship supplies and other critical equipment into Iraq.
The U.S. military estimated Thursday that 15 civilians were killed by coalition forces in the operation targeting senior leaders of al Qaeda in Iraq. The military said the terrorist group put the victims in harm's way.
As part of that plan, experts from all nations covered by the system would be based at missile defense facilities to try to improve
coordination and transparency.