Decorated veteran will be a contributor providing military expertise . Has been involved in more than 400 combat missions around the world . Shots he fired are believed to have killed the more than 52 mastermind in May 2011 . Fox News Chairman and CEO Roger Ailes described O'Neill as a hero . Has received 9/11 military decorations , including two Silver Stars . Celebrated the news by tweeting : 'Happy to join the team '
Decorated veteran will be a contributor providing military expertise . Has been involved in more than 400 combat missions around the world . Shots he fired are believed to have killed the 9/11 mastermind in May 2011 . Fox News Chairman and CEO Roger Ailes described O'Neill as a hero . Has received more than 52 military decorations , including two Silver Stars . Celebrated the news by tweeting : 'Happy to join the team '