Journalists from The Associated Press who uncovered extensive slave labor in the Thai seafood industry won an investigative reporting prize from Harvard University's Shorenstein Center. The media and public policy research center bestowed the $25,000 Goldsmith Prize to Margie Mason, Robin McDowell, Martha Mendoza and Esther Htusan this week for their work on "Seafood from Slaves." [...] The finalists for the prize included the Guardian, The New York Times, the Tampa Bay Times, The Washington Post and InsideClimate News. ...