Secretary of State Hillary Rodham Clinton insisted on Wednesday that the department is moving swiftly and aggressively to strengthen security at U.S. missions worldwide after the deadly Sept. 11 raid on the consulate in Libya, AP reported. In probably her last appearance in Congress as America's top diplomat, Clinton once again took full responsibility for the department's missteps leading up to assault at the U.S. Consulate in Benghazi, Libya that killed Ambassador Chris Stevens and three other Americans. Clinton's testimony was focusing on the Libya attack after more than three months of Republican charges that the Obama administration ignored signs of a deteriorating security situation there and cast an act of terrorism as mere protests over an anti-Muslim video in the heat of a presidential election. Washington officials suspect that militants linked to al-Qaida carried out the attack. -- SPA