The US state department has been heavily criticised in an official report into the deadly attack on a US consulate in Libya.
The report says systematic failures at the highest level led to insufficient security on the ground at the consulate in Benghazi.
US Secretary of State Hillary Clinton has accepted all 29 recommendations.
No individuals have been singled out and there is no mention of disciplinary action.
Ambassador J.Christopher Stevens died in the attack, along with three others.
Officials initially said it was sparked by protests against an anti-muslim video.
But it was later linked to al-Qaeda affiliates.