The Philadelphia Inquirer, one of the few U.S. newspapers to publish a caricature of the Prophet Mohammad from a series that sparked a wave of protests by Muslims, defended the action on Sunday by saying it was just doing its job. "This is the kind of work that newspapers are in business to do," said Amanda Bennett, the newspaper's editor. The Inquirer on Saturday published the most controversial image, which depicted the Prophet with a turban resembling a lit bomb, and it posted on its Web site an Internet link to the rest of the cartoons. For many Muslims, Islam...