Libya, 2012. At an unofficial CIA base in Benghazi, a group of ex-military contractors are providing security. In the aftermath of Gaddafi's downfall, a power vacuum exists and the climate is volatile. Military weapons are freely available. The US Ambassador to Libya, Chris Stevens, makes a visit to the area, staying in a compound near the CIA base. On the night of 11 September, 2012, the Ambassador's compound is attacked by hordes of heavily armed locals; the only forces willing and able to defend it are six CIA contractors.—grantss