When Edward Snowden revealed himself as the whistleblower who leaked information about the National Security Agency's data collection program, he became the subject of troves of media attention and an international manhunt.
Such a situation is relatively rare. Consider the many whistleblowers -- especially those in corporate America -- who cry foul, only to watch those cries lead to little more than silence. Too often it ends up someone should have listened. Here are some such cases:
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