See: Obama’s New National Security Team Should Be Asked Serious Questions About U.S. Foreign Policy (But Probably Won’t Be).
"The critical question that needs to be asked, and I want to say it over and over and over again, because people's lives were taken over this: Did the United States arm, fund, train, and support—either directly or through our so-called ‘allies’—the very people who killed the U.S. ambassador to Libya and the other Americans who died with him? Nobody in Washington asks this question even though these people's lives were taken." - Hillary Mann Leverett.
Inside Story Americas - Directing Obama's foreign policy [Source Al Jazeera]. The interview with Hillary Mann Leverett: 7:45 - 14:00.