• The fact that the F.B.I. and the State Department had information that differed from the account Davies gave to “60 Minutes” was knowable before the piece aired. But the wider reporting resources of CBS News were not employed in an effort to confirm his account. It’s possible that reporters and producers with better access to inside F.B.I. sources could have found out that Davies had given varying and conflicting accounts of his story.

• Members of the “60 Minutes” reporting team conducted interviews with Davies and other individuals in his book, including the doctor who received and treated Ambassador Stevens at the Benghazi hospital. They went to Davies’ employer Blue Mountain, the State Department, the F.B.I. (which had interviewed Davies), and other government agencies to ask about their investigations into the attack. Logan and producer Max McClellan told me they found no reason to doubt Davies’ account and found no holes in his story. But the team did not sufficiently vet Davies’ account of his own actions and whereabouts that night.

• Davies told “60 Minutes” that he had lied to his own employer that night about his location, telling Blue Mountain that he was staying at his villa, as his superior ordered him to do, but telling “60 Minutes” that he then defied that order and went to the compound. This crucial point — his admission that he had not told his employer the truth about his own actions — should have been a red flag in the editorial vetting process.

• After the story aired, The Washington Post reported the existence of a so-called “incident report” that had been prepared by Davies for Blue Mountain in which he reportedly said he spent most of the night at his villa, and had not gone to the hospital or the mission compound. Reached by phone, Davies told the “60 Minutes” team that he had not written the incident report, disavowed any knowledge of it, and insisted that the account he gave “60 Minutes” was word for word what he had told the F.B.I. Based on that information and the strong conviction expressed by the team about their story, Jeff Fager defended the story and the reporting to the press.

• On Nov. 7, The New York Times informed Fager that the F.B.I.'s version of Davies’ story differed from what he had told “60 Minutes.” Within hours, CBS News was able to confirm that in the F.B.I.'s account of their interview, Davies was not at the hospital or the mission compound the night of the attack. “60 Minutes” announced that a correction would be made, that the broadcast had been misled, and that it was a mistake to include Davies in the story. Later a State Department source also told CBS News that Davies had stayed at his villa that night and had not witnessed the attack.

• Questions have been raised about the recent pictures from the compound which were displayed at the end of the report, including a picture of Ambassador Stevens’s schedule for the day after the attack. Video taken by the producer-cameraman whom the “60 Minutes” team sent to the Benghazi compound last month clearly shows that the pictures of the Technical Operations Center were authentic, including the picture of the schedule in the debris.