end on 31 March, so began Operation Unified Protector, with NATO taking the lead until the operation's conclusion 31 October of that year. Aviano F-16s again returned to the skies over Libya in June 2014. Due to significant fighting in Tripoli during the 2014 Libyan conflict the U.S embassy was evacuated. During a five-hour non-combatant evacuation operation, three F-16s launched from Aviano guarded the evacuation of American citizens as embassy staff and U.S Marines convoyd overland from Tripoli into Tunisia. Cavalese cable-car disaster In the Cavalese cable car disaster, on 3 February 1998, a U.S. Marine Corps EA-6B Prowler jet flying too low on a training exercise from Aviano Air Base severed a cable car's cable over the Alps at Cavalese, Italy, causing 20 deaths. Imam rapito affair On 4 November 2009, the conviction by an Italian court of 22 CIA agents, a U.S. Air Force colonel and two Italian SISMI secret agents confirmed the role of the Aviano Air Base in the kidnapping, on 17 February 2003, of Hassan Mustafa Osama Nasr, in the so-called "extraordinary rendition" program. The man, abducted in Milan by CIA agents, was taken to Aviano Air Base for interrogation before being transported via Ramstein Air Base in Germany to Alexandria, Egypt, and turned over to the custody of Egypt's State Security Intelligence. Infrastructure and facilities Area A1 contains a few of Aviano's support functions (such as the library and chapel) and the Department of Defense Dependents School for the base population's children. Area A2 contains a fitness center, dining facility, dormitories, thrift shop and a fire department. Area C contains most of the 31st Civil Engineer Squadron's facilities. Area D contains a football field and picnic area. Area E contains the Carabinieri (Italian gendarmerie that enforces the law on the base) headquarters in this area. It contains also an Armed Forces Network station, military working dog kennels, and an Air Force Office of Special Investigations detachment. Area F is the flightline area, and is the largest area in Aviano. The complex contains the active runway and taxiways, as well as most of the base's facilities, which include a commissary and base exchange. Role and operations 31st Fighter Wing The 31st Fighter Wing is made up of four groups, each consisting of several squadrons. The 31st Operations Group ensures the combat readiness of two F-16CG squadrons, one air control squadron, and one operational support squadron