The attackers killed Ambassador Chris Stevens and three other Americans.
After a meeting with Pakistan's foreign minister Friday, she told reporters the State Department's main concern is keeping Americans abroad safe.
"Yesterday afternoon when I briefed the Congress I made it clear that keeping our people everywhere in the world safe is our top priority. What happened in Benghazi was a terrorist attack and we will not rest until we have tracked down and brought to justice the terrorists who murdered four Americans. And we are taking aggressive measures at all of our posts to protect our staffs and their families along with locally employed people who provide so many important contributions to the work of our missions," said Clinton.
The meeting with Pakistani Foreign Minister Hina Rabbani Khar comes as protests in that country claimed 15 lives Friday.
Protests in Libya, Pakistan, Egypt and other countries were sparked by a short film on YouTube considered offensive to Muslims.