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David Cameron has become the first sitting UK prime minister to appear on David Letterman's Late Show. His mission: to bang the drum of business for Britain. Daniel Garrahan reports on whether Mr Cameron was able to raise Britain's profile in the US.
Related article: http://www.ft.com/cms/s/0/a50fddd6-0855-11e2-a2d8-00144feabdc0.html