Those injured were a firefighter treated for heat exhaustion, a bystander who suffered a heart attack, and a couple in their 80s who were treated for panic attacks.
Defence lawyer Martin Morgan said that while what happened was a "vicious attack", it had "happened in the heat of the moment" in what was "a moment of madness".
Susan Rice, the U.S. ambassador to the United Nations, took the most direct heat because of her assertions in a Sunday television interview days after the attack that linked the attacks to a demonstration outside the Benghazi consulate.