NO matter how much Russia hates it, the US now has a clear track to build its long-range missile defense system in Europe. The crucial go-ahead came Thursday from the Czech Republic, where a vital radar site would be located. NATO leaders added their unanimous backing for the idea at a European summit, all but sealing the controversial deal just before US President George W. Bush's weekend meetings with Russian President Vladimir Putin. Putin has harshly criticized the proposed system, portraying it as a threat to Russia, virtually on its doorstep. Beyond the immediate dispute, the Czech accord and the NATO endorsement marked an important moment in the long history of US efforts to persuade allies of the merits of missile defense. At Thursday's NATO session the leaders declared that the proposed US missile defense shield for Europe would make a substantial contribution to the region's security and that Russia should stop criticizing it, US Secretary of State Condoleezza Rice told reporters afterward. The intent is to combine the US system, which is meant to shoot down long-range missiles, with one run by NATO that could defend against shorter-range missiles that are more of a worry to countries like Turkey, Greece, Romania and Bulgaria. Because of geography, they face a nearer-term threat from Iranian missiles. The Russians insist it's really a scheme to undermine their own missile force. The Czech radar would be linked to a set of 10 interceptors that the US wants to place in Poland. The Poles have not yet agreed. Poland has insisted on US military aid as part of an agreement, and Bush recently indicated that was possible. The Pentagon wants to have the Polish and Czech sites in running order by about 2012. Illustrating how attitudes have changed, Rice said that when Bush attended his first NATO summit in 2001 “perhaps only two allies gave even lukewarm support for the notion of missile defense.” She described Thursday's NATO statement as a “breakthrough agreement” that isolates Russia in its adamant opposition. The NATO leaders said they agreed with the broader point that ballistic missiles pose an increasing threat to Europe. At their meeting scheduled for Sunday in the Black Sea resort city of Sochi, Bush and Putin are expected to agree that missile defense is one of many high-priority topics for their successors. But it appears unlikely that Putin, who steps down in May, will suddenly embrace a project he considers to be provocative. The Czechs agreed to host an American radar that would be used to track the flight of missiles headed toward Europe from the Mideast. It would, in effect, be a set of eyes needed to guide missile interceptors to their target - long-range ballistic missiles of the sort Washington believes Iran is developing. Czech Foreign Minister Karel Schwarzenberg said a related question - whether the Russians would be allowed to station personnel at the site to monitor the radar's use - was a matter that his government would handle alone. The Czechs had been upset when the Bush administration, hoping to ease Russian opposition, initially floated the idea of allowing Russian monitors last fall. Schwarzenberg's choice of words seemed to indicate some residual anger. “It is something which we will talk to the Russians about ourselves - not to be there as translators for the Americans,” he said. “It is entirely up to us.” There could be other hitches, especially since Bush will be leaving office in January. Polish supporters of the plan are concerned that the next US administration could kill the project. Among the major candidates to succeed Bush, Republican John McCain is a strong supporter of the missile defense program, while Democrats Barack Obama and Hillary Rodham Clinton have been less vocal on the issue. The Russians, despite their heated rhetoric, seem to have come to accept that they are unlikely to stop the system. They said as much during talks last month in Moscow with Rice and US Defense Secretary Robert Gates, who have been pushing a series of proposals intended to make the project more palatable for the Russians. But this does not mean Moscow's misgivings will stop being an irritant in US-Russian relations, nor does it guarantee that the defensive shield for Europe will be the answer to missile threats. After decades of development, at a cost exceeding $100 billion, the missile defense system now in place in America - mainly at bases in Alaska and California - is unproven and unpopular in Congress. It began as a way to stop long-range missiles launched in a doomsday scenario during the Cold War years when the United States and the Soviet Union targeted each other with thousands of nuclear missiles. Today's is more modest, designed to stop a limited attack by North Korea. __