Libya: Obama faces new questions on Benghazi

US President Barack Obama's administration is facing new questions over the attack on the US consulate in Libya, amid reports of military preparations to target those behind it. A Congressional committee asked whether repeated requests for more security at the Benghazi consulate were rejected. The US ambassador was among four Americans killed on 11 September. The US is gathering intelligence ahead of a possible military operation against those implicated, US media say.