Mr Putin is expected to urge Mr Blair to refuse to allow the US to modernise missile-tracking radar stations in the UK if the White House decides to go ahead with a new missile defence system dubbed "son of Star Wars".
BBC: Putin seeks UK 'co-operation'
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In the mid-1980s, American intelligence discovered a huge missile- detection and -tracking radar being built by the Soviet Union near the Western Siberian town of Krasnoyarsk.
CENTERFORSECURITYPOLICY: With Friends Like These....
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He also announced the military will work with Japan to increase radar capability to improve early warning and tracking of any missile launched from North Korea.
CNN: U.S. to beef up missile defense against North Korea, Iran