By the CNN Wire Staff

The hunt for those who killed U.S. diplomatic staffers in Libya will include warships and surveillance drones as outraged Americans and Libyans deplore the violent killings.

The slain U.S. ambassador to Libya, Chris Stevens, helped save Libya's eastern city of Benghazi during last year's revolution. He died there Tuesday night, along with another diplomat and two State Department security officers, when a mob stormed the U.S. Consulate and set it ablaze.