This image released by HBO shows Sen. John McCain, R-Ariz., who is the subject of the documentary "John McCain: From Whom the Bell Tolls," debuting on Memorial Day on HBO. (Clair Popkin/HBO via AP)
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This image released by HBO shows Sen. John McCain, R-Ariz., who is the subject of the documentary "John McCain: From Whom the Bell Tolls," debuting on Memorial Day on HBO. (Clair Popkin/HBO via AP)
