The right to speak anonymously had to weigh again the benefit of the public knowing the author.
She, like many dancers interviewed, would only speak anonymously about the issue.
But they refused to identify others who speak anonymously in the video.
They spoke anonymously because the investigation is still going on.
The official spoke anonymously because he was not authorized to speak to the news media.
A few spoke anonymously, and others refused to talk at all.
"The whole wall shook," said the neighbor, who would speak only anonymously.
Both people spoke anonymously because they did not want to speak publicly for the family.
"Our job is not to protect the building but the President," said the official, who would speak only anonymously.
The six current and former officials would speak to a reporter only anonymously.