Question: Hartmut Mehdorn, is a German manager and mechanical engineer, he served as CEO of Germany's second largest airline, and Europe's seventh-largest airline in terms of passengers carried, until he stepped down in January 2013?

full_context: Document 1: Jonathan G. Ornstein: Jonathan Ornstein is Chairman and Chief Executive Officer of Mesa Air Group, Inc., and was appointed effective May 1, 1998. From April 1996 to his joining the company as Chief Executive Officer, Ornstein served as President and Chief Executive Officer and Chairman of Virgin Express, a European airline. From 1995 to April 1996, Ornstein served as Chief Executive Officer of Virgin Express Holdings, Inc. Ornstein joined Continental Express as President and Chief Executive Officer in July 1994 and, in November 1994, was named Senior Vice President, Airport Services at Continental Airlines. Ornstein was previously employed by the company from 1988 to 1994, as Executive Vice President and as President of the company’s WestAir Holding, Inc., subsidiary.
Document 2: Hartmut Mehdorn: Hartmut Mehdorn (born 31 July 1942 in Warsaw) is a German manager and mechanical engineer. Until May 2009 he served as CEO of Deutsche Bahn AG, Germany's biggest railway company. He served as CEO of Germany's second largest airline Air Berlin until he stepped down in January 2013. In March 2013 he assumed a CEO position at Flughafen Berlin Brandenburg GmbH (FBB), the owner and future operator of Berlin Brandenburg Airport, until March 2015.
Document 3: Blue Air: Blue Air is an airline headquartered in Bucharest, with its main hubs at Henri Coandă International Airport and Turin Airport. Since 2016, it has become the largest Romanian airline by scheduled passengers flown. In 2016, Blue Air carried 3.6 million passengers, a significant increase over the 2 million passengers flown the previous year. As of May 2017, Blue Air flies to 70 destinations. Despite operating as a low-cost airline, Blue Air started introducing free sandwiches and drinks on-board shorter flights, and a full hot meal, snacks, hot/cold and alcoholic beverages on longer flights. This is considered unheard of in the low-cost sector, particularly as traditionally 'full service' carriers such as British Airways controversially removed free meals, snacks and drinks in 2017, and is considered key to Blue Air's continued success.
Document 4: Martin Winterkorn: Martin Winterkorn (born 24 May 1947) is the former chairman of the board of directors (CEO, "Vorstandsvorsitzender" in German) of Volkswagen AG, the parent company of the Volkswagen Group, and former chairman of the supervisory board of Audi and Porsche Automobil Holding SE.
Document 5: Air Berlin: Air Berlin PLC & Co. Luftverkehrs KG (), branded as airberlin or airberlin.com, is Germany's second-largest airline, after Lufthansa, and Europe's seventh-largest airline in terms of passengers carried. It maintains hubs at Berlin Tegel Airport and Düsseldorf Airport and serves 12 German cities as well as destinations in Europe, the Caribbean and the Americas.
Document 6: AeroLogic: AeroLogic is a German cargo airline based in Schkeuditz near Leipzig. It is a joint-venture between DHL Express and Lufthansa Cargo which operates scheduled international and long-haul cargo services out of its hubs Leipzig/Halle Airport and Frankfurt Airport.
Document 7: Frankfurt Airport: Frankfurt Airport (IATA: FRA, ICAO: EDDF) (German: "Flughafen Frankfurt am Main" , also known as "Rhein-Main-Flughafen") is a major international airport located in Frankfurt, the fifth-largest city of Germany and one of the world's leading financial centres. It is operated by Fraport and serves as the main hub for Lufthansa including Lufthansa CityLine and Lufthansa Cargo as well as Condor and AeroLogic. The airport covers an area of 4942 acres of land and features two passenger terminals with a capacity of approximately 65 million passengers per year, four runways and extensive logistics and maintenance facilities.
Document 8: Lufthansa: Deutsche Lufthansa AG () (] ), commonly known as Lufthansa (sometimes also as "Lufthansa German Airlines"), is the largest German airline and, when combined with its subsidiaries, also the largest airline in Europe, in terms of fleet size, and the second largest airline in terms of passengers carried during 2016. The name of the company is derived from "Luft" 'air' and "Hansa", the Hanseatic League. Lufthansa is one of the five founding members of Star Alliance, the world's largest airline alliance, formed in 1997.
Document 9: Berlin Tegel Airport: Berlin Tegel "Otto Lilienthal" Airport (German: "Flughafen Tegel "Otto Lilienthal"" ) (IATA: TXL, ICAO: EDDT) is the main international airport of Berlin, the federal capital of Germany. It formerly served West Berlin. The airport is named after Otto Lilienthal and is the fourth busiest airport in Germany with just over 20.7 million passengers in 2014. The airport is a hub for Air Berlin and serves as a base for Germanwings. It features flights to several European metropolitan and leisure destinations as well as some intercontinental routes.
Document 10: Dachser: DACHSER Group SE & Co. KG is a German logistics company, founded by Thomas Dachser in 1930, with its headquarters in Kempten in the Allgäu region. In January 2005, Thomas Dachser’s grandson, Bernhard Simon, took over as Head of the Management Board. DACHSER is involved in the European Logistics, Air & Sea Logistics and Food Logistics business segments. In contract logistics, the group provides transport, warehousing and value-added services and DACHSER is one of the world market leaders in system logistics.
Document 11: Luxair Flight 9642: Luxair Flight 9642 was a scheduled international passenger flight flying from Berlin Tempelhof Airport, Germany, to Luxembourg Findel Airport, Luxembourg. The flight carried 19 passengers and 3 crew members. The flight was operated by Luxair, the flag carrier (national airline) of Luxembourg. The plane was a Fokker 50 and registered as LX-LGB. Lufthansa had a codeshare on the flight as LH2420. On 6 November 2002, the flight crashed while on final approach to Luxembourg Findel Airport about 6 nautical miles (11 km) short of the runway while trying to land in fog. 20 out of the 22 passengers and crew perished
Document 12: Fritz Todt: Fritz Todt (4 September 1891 – 8 February 1942) was a German construction engineer, senior Nazi figure, who rose from "Inspector General for German Roadways" where he oversaw the construction of German Autobahnen ("Reichsautobahnen") to Reich Minister for Armaments and Ammunition where he led the entire war military economy. At the beginning of World War II he founded what Hitler named "Organisation Todt" a military engineering company which supplied industry with forced labor and administered all constructions of concentration camps in the late phase of the Third Reich. He died in a plane crash in 1942.
Document 13: Daimler AG: Daimler AG (] ) is a German multinational automotive corporation. Daimler AG is headquartered in Stuttgart, Baden-Württemberg, Germany. As of 2014, Daimler owns or has shares in a number of car, bus, truck and motorcycle brands including Mercedes-Benz, Mercedes-AMG, Smart Automobile, Detroit Diesel, Freightliner, Western Star, Thomas Built Buses, Setra, BharatBenz, Mitsubishi Fuso, MV Agusta as well as shares in Denza, KAMAZ, Beijing Automotive Group. The luxury Maybach brand was terminated at the end of 2012, but revived in April 2015 as "Mercedes-Maybach" versions of the Mercedes-Benz S-Class and G-Class. In 2016 Daimler sold 3.0 million vehicles. By unit sales, Daimler is the thirteenth-largest car manufacturer and is the largest truck manufacturer in the world. In addition to automobiles, Daimler manufactures buses and provides financial services through its Daimler Financial Services arm. The company is a component of the Euro Stoxx 50 stock market index.
Document 14: Munich Airport: Munich Airport (IATA: MUC, ICAO: EDDM) , German: "Flughafen München" , is a major international airport near Munich, the capital of Bavaria. It is the second busiest airport in Germany in terms of passenger traffic behind Frankfurt Airport, and the seventh-busiest airport in Europe, handling 42 million passengers in 2016. It is the world's 15th-busiest airport in terms of international passenger traffic, and was the 34th-busiest airport worldwide in 2015. As of February 2017, the airport features flights to 248 destinations, making it the airport with the fifth-most destinations worldwide. Munich Airport serves as the secondary hub for Lufthansa including Lufthansa Regional and its Star Alliance partners besides Frankfurt.
Document 15: Turkish Airlines: Turkish Airlines (Turkish: "Türk Hava Yolları") () is the national flag carrier airline of Turkey, headquartered at the Turkish Airlines General Management Building on the grounds of Atatürk Airport in Yeşilköy, Bakırköy, Istanbul. s of 2017 , it operates scheduled services to 302 destinations in Europe, Asia, Africa, and the Americas, making it the fourth-largest carrier in the world by number of destinations. It serves more destinations non-stop from a single airport than any other airline in Europe. Turkish Airlines flies to 120 countries, more than any other airline. With an operational fleet of fourteen cargo aircraft, the airline's cargo division serves 64 destinations. Istanbul Atatürk Airport is its main base, and there are secondary hubs at Esenboğa International Airport, Sabiha Gökçen International Airport, and Adnan Menderes Airport. Turkish Airlines has been a member of the Star Alliance network since 1 April 2008.
ground_truth: Air Berlin