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The Obama administration is leaving open the possibility of giving Moscow certain secret data on US interceptor missiles due to help protect Europe from any Iranian missile strike. A deal is being sought by Washington that could include classified data exchange because it is in the US interest to enlist Russia and its radar stations in the missile-defense effort, a Pentagon spokeswoman said on Tuesday in written replies to Reuters. No decision has been made yet on whether the United States would offer data about the interceptors' "velocity at burnout," or VBO, said Air Force Lieutenant Colonel April Cunningham, the spokeswoman, but it is not being ruled out. VBO is at the heart of what Russia wants as the price for its cooperation, said Riki Ellison, head of the private Missile Defense Advocacy Alliance, who has close ties to missile defense and military officials. VBO tells how fast an interceptor is going when its rocket-booster motor fuel is spent and the motor burns out. Ellen Tauscher, the administration's special envoy for strategic stability and missile defense, held talks in Moscow on Tuesday with Russian Deputy Foreign Minister Sergei Ryabkov, including on missile defense, a State Department spokesman said. The Defense Department, in its response to Reuters, ruled out giving Russia information on either "telemetry" or US "hit-to-kill" technology. Telemetry involves the automatic transmission and measurement of data from remote sources to monitor a missile flight. Hit-to-kill is the way in which modern US interceptors, such as Raytheon Co's Standard Missile-3, destroy targets by slamming into them. | 
