In February 2011, a civil war broke out in Libya. A rebellion started against Muammar al-Gaddafi and his government. A few weeks later U.S. envoy Chris Stevens came to Benghazi, Libya's second largest city, by cargo ship. He arrived on April 5. In August Gadhafi was driven out of the capital, Tripoli. On 20 October 2011 Gadhafi was killed. Chris Stevens was named as Ambassador to Libya in May 2012. He was to be based in Tripoli. Security people working for the U.S. government warned they needed more security but were turned down. 