A top US official who was in Libya during the deadly attack on the US Consulate in Benghazi has given the first public account of the event.
Gregory Hicks, deputy chief of mission in Tripoli, said he was "stunned" by UN Ambassador Susan Rice's comments that the attack was spontaneous.
UN Ambassador Susan Rice has been the focus of outrage from Republicans in Congress, for giving the news media what has been acknowledged as an incorrect explanation for the attack.
She said on a Sunday chat show on 16 September that the attack had grown out of an anti-US protest, while other officials have said they knew at the time it was an organised, armed assault, possibly by an Islamist militant group.
"My jaw dropped and I was embarrassed," Mr Hicks said on his reaction to her interview.