WASHINGTON - Secretary of State Hillary Clinton is back on the job today after a brief hospital stay following a concussion and blood clot.

Clinton was released from New York Presbyterian Hospital last Wednesday. 

Today, she met with her assistant secretaries of state. Friday, she will be involved in Afghan President Hamid Karzai's visit to Washington.

It is not clear if or when Clinton will testify about the deadly attack on the embassy in Benghazi. Some senators have threatened to delay confirmation hearings for her successor, Sen. John Kerry, until she testifies about the attack.