And they have settled on Poland for the interceptors and the Czech Republic for the radar.
The program, which employs hit-to-kill technology in its interceptors, has performed well in tests.
Their information would be linked up by computer systems that could guide the interceptors.
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Ideally, an underlay of ground-based interceptors would also be deployed in a layered SDI system.
We already have ground-based interceptors at Fort Greeley, Alaska and at Vandenberg Air Force Base in California.
The new system will have "hundreds" of missile interceptors instead, the Pentagon's point man on it said.
The whole purpose of tests - whether of missiles or missile interceptors - is to improve them.
Whether the U.S. system of ground-based interceptors are the right response quickly became a matter of debate Friday.
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The U.S. interceptors have failed in some recent tests, with the last fully successful test occurring in 2008.
WSJ: U.S. to Boost Missile Defenses in Response to North Korea
Mr. Hagel said the U.S. wouldn't purchase the new weapons until there are successful tests of the interceptors.
WSJ: U.S. to Boost Missile Defenses in Response to North Korea
In 1976, the U.S. deployed 100 Spartan and Sprint interceptors in an ABM defense at Grand Forks, N.
Hagel acknowledged a problem with the guidance system of missile interceptors and said further testing would occur this year.
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W. Bush administration plans to deploy 14 more ground-based interceptors (GBIs) in Alaska, bringing the 2009 total to 54.
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The United States is, right this second, continuing with a play to deploy land-based interceptors in Romania by 2015.
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Mr. Hagel said the U.S. wouldn't purchase the new weapons until military officials conduct successful tests of the interceptors.
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He acknowledged a problem with the guidance system of missile interceptors and said further testing would occur this year.
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After all, the current plan is modest -- to deploy just 20 interceptors by 2005 and 100 by 2007.
These could involve ground-based anti-missile systems, airborne lasers and space-based sensors and, in due course, weapons (interceptors and directed energy).
Officials in Moscow had hinted that they would not consider further nuclear arms cuts if the SM-3 interceptors were deployed.
The U.S. could have already had those 14 more interceptors in place, along with another 10 in Europe next year.
The US announced plans to deploy 14 additional missile interceptors in Alaska, and an early-warning radar in Japan, on Friday.
Each Party shall not convert and shall not use ICBM launchers and SLBM launchers for placement of missile defense interceptors therein.
The SM-3 interceptors now planned have a shorter range and fly less quickly than the rockets proposed by the Bush administration.
They maintained their defense of Moscow and improved it a decade ago, replacing the Galoshes with new long-range interceptors known as Gorgons.
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Each Party further shall not convert and shall not use launchers of missile defense interceptors for placement of ICBMs and SLBMs therein.
When asked about the "poor performance" of interceptors during recent trials, Mr Hagel said further tests would be carried out this year.
The US and other Nato allies have deployed Patriot missile interceptors to repel any possible attack by missiles or aircraft from Syria.
Interceptors are vehicles that are launched to intercept intercontinental missiles in flight.
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Then sea-based interceptors and other technologies can be added as soon as they are ready, to create a truly global missile defense.
The Bush administration has long wanted to put missile interceptors in Poland.
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