September 4, 2015: Former Clinton aide Jake Sullivan testifies to the House Benghazi Committee in a private session.

Jake Sullivan on his way to testify before the House Benghazi Committee on September 4, 2015. (Credit: Alex Wong / Getty Images)

Jake Sullivan on his way to testify before the House Benghazi Committee on September 4, 2015. (Credit: Alex Wong / Getty Images)

He tells reporters afterwards that he answered all questions for nine hours, but does not go into details. (ABC News, 9/4/2015)