(This post was updated at 4:40 p.m. ET)
How did TV's most storied newsmagazine make such a huge mistake? And why won't they explain exactly what happened?
Those are the questions left unanswered days after 60 Minutes correspondent Lara Logan and CBS News Chairman Jeff Fager retracted an Oct. 27 story about the terrorist attack on the U.S. mission in Benghazi, Libya, that featured a suspect source: government contractor Dylan Davies.