In his United Nations speech on Tuesday, President Obama talked about the September 11 attack on the U.S. consulate in Libya and declared that "there should be no doubt that we will be relentless in tracking down the killers and bringing them to justice." What he didn't say is how relentless he'll be in tracking down the security lapses and intelligence failures that contributed to the murders. Let's say there's some doubt about that.

None of the initial explanations offered by the White House and State Department since the assault on the Benghazi consulate has held up. First the Administration blamed protests provoked by an amateurish anti-Islam clip posted on YouTube. Cue Susan Rice, the U.N. Ambassador and leading candidate for Secretary of State in a second Obama term: "What happened initially was that it was a spontaneous reaction . . . as a consequence of the video, that people gathered outside the embassy and then it grew very violent."

Administration officials also maintained that the diplomatic missions in Libya and Egypt, the site of the first attacks this September 11, were properly defended and that the U.S. had no reason to prepare for any attack. "The office of the director of National Intelligence has said we have no actionable intelligence that an attack on our post in Benghazi was planned or imminent," Secretary of State Hillary Clinton said last week, calling the security measures in place there "robust."

You'd think this admission would focus attention on why the compound was so vulnerable to begin with. But the Administration wants to avoid this conversation. The removal of all staff from Benghazi, including a large component of intelligence officers, would also seem to hinder their ability to investigate the attacks and bring the killers to justice.