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Face the Nation, 10.02.11

| Sen. John McCain (R-Ariz.) details NATO's waning position in Libya and on the current pool of candidates, and those thinking about running, in the 2012 GOP presidential race; Also, Gov. Haley Barbour (R-Miss.) and Gov. Martin O"Malley (D-Md.) weigh in on how the politics of Gov. Chris Christie and his potential presidential bid will shake up the 2012 GOP election.