coalition. >> my name is chris stevens and i'm the new u.s. ambassador to libya. >> his job? to bring stability to a hot zone. >> gadhafi's weapons stockpiles had been raided and weapons were everywhere. so one of the things that the u.s. was interested in doing, and in particular the cia, was collecting weapons. >> that mission brought stevens to benghazi on september 11. when he opened a cultural center and met with officials. >> ambassador stevens had met with a turkish official and the consulate there in benghazi and everything was quiet for them. >> that all changed when darkness fell. at 9:42 p.m., gunfire is heard outside the benghazi consulate. then a loud explosion.