Four Americans died in the 2012 Benghazi attack: Ambassador Chris Stevens, Information Officer Sean Smith, and two CIA operatives, Glen Doherty and Tyrone Woods, both former Navy SEALs. Stevens is the first U.S. ambassador killed in an attack since Adolph Dubs was killed in 1979. Senior intelligence officials later acknowledged that Woods and Doherty were contracted by the Central Intelligence Agency, not the State Department as previously identified, and were part of Global Response Staff (GRS), a team that provides security to CIA case officers and countersurveillance and surveillance protection.