'US May Have to Shoot Down N. Korea ICBM Over Russia'

A U.S defense analysis Web site says the U.S. may be forced to shoot down an intercontinental ballistic missile(ICBM) fired toward it by North Korea over Russia.
Defense One said Thursday that if Pyongyang fires a missile at the United States, its most likely trajectory would take it over the North Pole. The article said a U.S. attempt to shoot down a missile would probably occur within Russian radar space — and possibly over Russia itself.
General Lori Robinson, who leads both the U.S. Northern Command and the North American Aerospace Defense Command, was quoted as saying that the possibility is something the U.S. is aware of and is working its way through.
The article said that missile-defense physics may require U.S. interceptors to fly into "the teeth of the Russian early warning net."
By the year’s end, the U.S. will have deployed 44 ground-based interceptors, or GBIs, with 40 of them at Fort Greeley, Alaska and four at Vandenberg Air Force Base in California.
Defense One said that if deterrence fails, those interceptors would be the last line of defense against a North Korean missile.
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