Facebook needs to be more forthcoming about the kinds of content it takes down. That's according to 73 organizations, including the American Civil Liberties Union, Black Lives Matter, Arab American Institute, SumOfUs, Indigenous Environmental Network and Sierra Club, that signed a letter sent to Facebook CEO Mark Zuckerberg. The groups are asking for clarity on the social networking giant's position on removing videos and other content that highlight civil rights issues. The letter states that the groups are "deeply concerned with the recent cases of Facebook censoring human rights documentation."

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