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'
2.
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.
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