 Complete the following phrase:  Following the overthrow of the Gaddafi government, the city would be plagued by instability due to weakened interim governments, a split between the Tripoli-based government and the Libyan National Army, infighting between militias, and reemerging Islamist militancy. In 2012, Benghazi became the center of controversy in the United States when the American diplomatic mission in Benghazi 