(L to R) Lt. Col. Andrew Wood, Utah National Guard of the US Army, Eric Nordstrom, Regional Security Officer of the US Department of State, Charlene R. Lamb, Deputy Assistant Secretary for International Programs of the Bureau of Diplomatic Security of the US Department of State, and Patrick Kennedy, Under Secretary for Management of the US Department of State, testify on the Security Failures of Benghazi before the US House Oversight and Government Reform Committee on Capitol Hill in Washington, capital of the United States, Oct 10, 2012. The attack on the US consulate in Benghazi, Libya, on Sept 11, 2012 left US Ambassador to Libya Christopher Stevens and three of his staff dead, a tragedy that shocked America and the world. [Photo/Xinhua]