David Letterman
Former British Prime Minister Tony Blair, left, smiles with David Letterman during a taping of the "Late Show" on Sept. 8, 2009.
Author: CBS News Staff
Credit: CBS
Former British Prime Minister Tony Blair, left, smiles with David Letterman during a taping of the "Late Show" on Sept. 8, 2009.
Author: CBS News Staff
Credit: CBS
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