Cable mainstay Larry King's CNN show ends Thursday after 25 years. His successor, British talk-show host Piers Morgan, might be an unfamiliar face to many American viewers, but he's been a major player in the U.K. media scene for decades.

A Web site created a stir by publishing a story claiming Sen. Hillary Clinton, D-N.Y., had plans to use a purported Islamist upbringing of Sen. Barack Obama, D-Ill., against him in her presidential campaign. Experts discuss the struggle to separate…

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