Secretary of State Hillary Clinton has said she never saw the requests for additional security for the US mission in Benghazi, Libya, which was attacked in September, because they were handled by other State Department officials and normally would not reach her level.
Clinton is testifying before the Senate Foreign Relations Committee about the September attack by Islamist militants in which the US ambassador and three other Americans were killed.
"The specific security requests pertaining to Benghazi, you know were handled by the security professionals in the department. I didn't see those requests, they didn't come to me, I didn't approve them, I didn't deny them," Clinton said.
She noted that one of the findings of an accountability review board on the Benghazi attack was that "these requests don't ordinarily come to the secretary of state."
Hillary Clinton was presented with a personalised American football jersey and helmet on her return to work yesterday.
The Secretary of State, 65, had been absent for a month after suffering from a stomach virus, a concussion and a blood clot in her head.
Today is US State Secretary Hillary Clinton's first day back at work following a spell in hospital to treat a blood clot in her head.
Hillary Clinton will resume her duties as the US Secretary of State today, five days after being released from hospital for treatment of a blood clot.
The State Department confirmed that 65-year-old Clinton will sit down with assistant secretaries of state for a closed-door meeting at 09:15am (14:15 GMT).
This will start a week long schedule of just under a dozen meetings, including three at the White House.
Her doctors say they expect a full recovery, following a series of ailments over the last month.
US Secretary of State Hillary Clinton is resting at home after suffering from a blood clot and will return to work next week, a State Department spokeswoman said.
Clinton was released from hospital yesterday after receiving treatment for the blood clot - doctors expect her to make a full recovery.
State Department spokeswoman Victoria Nuland said: "She's resting at home. She's looking forward to getting back to the office. She is very much planning to do so next week."
Clinton, who will be replaced bySenator John Kerry as Secretary of State for Barack Obama's second term, is said to be keeping up with her work by receiving memos and talking to staff.
US Secretary of State Hillary Clinton was discharged from a New York hospital yesterday after being treated for a blood clot near her brain.
Her doctors expect her to make a full recovery, the State Department said.
Secretary Clinton was discharged from the hospital this evening.
Her medical team advised her that she is making good progress on all fronts, and they are confident she will make a full recovery.
She's eager to get back to the office, and we will keep you updated on her schedule as it becomes clearer in the coming days.
Both she and her family would like to express their appreciation for the excellent care she received from the doctors, nurses and staff at New York Presbyterian Hospital Columbia University Medical Center.
US Secretary if State Hillary Clinton has been discharged from a New York Hospital, the State Department said.
Her medical team found she was making good progress and remain confident she will make a full recovery, officials added.
There has been no official confirmation of reports that the US Secretary of State Hillary Clinton has left hospital after being treated for a blood clot in her head.