One of the questions sure to come up tonight, did intelligence failures, security mistakes here at home cost four americans their livesn benghazi, libya, including u.S. Ambassador chris stevens?... See More
One of the questions sure to come up tonight, did intelligence failures, security mistakes here at home cost four americans their livesn benghazi, libya, including u.S. Ambassador chris stevens? Today, hours before the debate gets under way tonight secretary of state hillary clinton spoke out declaring that the responsibility is hers. C's senior foreign affairs correspondent maha raddatz is here. Martha? Reporter: Good evening, diane. Secretary clinton said little about the investigation into the deaths of the four americans but she is now saying she is the one who should shoulder the blame. I take responsibility. I'm in charge of the state department. Reporter: On the eve of this presidential debate, growing questions and political controversy still raging over the deaths of the americans on the eve of this presidential debate, mrs. Clinton deflected criticism that had been squarely aimed at the white house. The president and the vice president certainly wouldn't be knowledgeable about specific decisions that are made by security professionals. Reporter: In last week's vice presidential debate, vice president joe biden said the white house was unaware of security requests from state department officials in libya, who had told congress of those requests just the day before. And they wanted more security there. Well, we weren't told they wanted more security there. We did not know they wanted more security again. And, by the way, at the time we were told exactly -- we said exactly what t intelligence community told us that they knew. Reporter: And that is where the investigation is now foe combusted not only on security failure, diane, but intelligence failure, all. All right, thank you, martha. It will be great to be watching the debate with you. As well.
This transcript has been automatically generated and may not be 100% accurate.