Barack Obama took office undecided about Bush's plan to base 10 interceptor missiles in Poland and sophisticated radar in the Czech Republic – a system designed to shoot down long-range missiles that might be fired from Iran or elsewhere in the Middle East. Building had not started in either country.
The Czech installation was planned for the Brdy military installation 55 miles (90 kilometers) southwest of Prague. The Polish site was to be at a former military air base near the town of Redzikowo, about 115 miles from Russia's westernmost edge.
Obama has been reaching out to Russia, which had expressed outrage at the notion of missiles being pointed in its direction from a region that was firmly in the Soviet orbit just 20 years ago.
On Thursday, Obama announced he was shifting the plan from Eastern Europe to other locations. He and other administration officials said they have concluded that Iran's medium- and short-range missiles pose a greater threat and require more flexible technology.