Question: When did the man die whom Berlin Tegel Airport was named after?

Context paragraphs:
Aeroamerica: Aeroamerica, Inc. was founded as a US supplemental carrier in 1973.  It was headquartered at Seattle Boeing Field, Washington.  In 1975 the airline established an overseas base at Tegel Airport in what used to be West Berlin prior to German reunification.  Berlin Tegel was the main operating base from 1975 until 1979.  Aeroamerica ceased operations in 1982.

Otto Lilienthal: Otto Lilienthal (23 May 1848 – 10 August 1896) was a German pioneer of aviation who became known as the "flying man".  He was the first person to make well-documented, repeated, successful flights with unpowered airplanes.  Newspapers and magazines published photographs of Lilienthal gliding, favorably influencing public and scientific opinion about the possibility of flying machines becoming practical.  On 9 August 1896, his glider stalled and he was unable to regain control.  Falling from about 15 m (50 ft), he broke his neck and died the next day, 10 August 1896.

Modern Air Transport: Modern Air Transport, Inc. (originally Modern Air Transport/MAT, subsequently Modern Air) was a United States-based non-scheduled and supplemental carrier founded in 1946.  At different stages in its history its operations were based in Newark and Trenton, New Jersey, Baltimore, and Miami.  In addition to Miami, New York used to be a base for Modern Air.  In 1968, the airline established an overseas base at Berlin Tegel Airport in what used to be West Berlin prior to German reunification.  Between 1968 and 1974, operations increasingly focused on Berlin Tegel.  Modern Air ceased trading in 1975.

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.

Berlin Brandenburg Airport: Berlin Brandenburg Airport (IATA: BER, ICAO: EDDB) (German: "Flughafen Berlin Brandenburg Willy Brandt" ) is an international airport under construction, located adjacent to the current Berlin Schönefeld Airport in Schönefeld, 18 km south of the city centre of Berlin, the capital of Germany.  It was originally intended to replace both Schönefeld and Berlin Tegel Airport, and to become the single commercial airport serving Berlin and the surrounding state of Brandenburg, an area with a combined 6 million inhabitants.  However, it is now planned that it will only replace Tegel, and the old Schönefeld airport is currently being expanded because it will still be required to cope with rising passenger numbers.

1961 F-84 Thunderstreak incident: The 1961 F-84 Thunderstreak incident, occurring on 14 September 1961, was an incident during the Cold War, in which two Republic F-84F Thunderstreak fighter-bombers of "JaBoG 32" of the German Air Force ("Luftwaffe") crossed into East German airspace because of a navigational error, before landing at Berlin Tegel Airport.  The two planes successfully evaded a large number of Soviet fighter planes by finding cover in a heavy layer of clouds, but also by the actions of an airman at the United States Air Force air route traffic control center at Berlin Tempelhof Airport who ordered the planes on to Berlin rather than forcing them to turn around and face the pursuing fighter planes.  The event came at a historically difficult time in relations between the two Germanies.  Only a month before, the Berlin Wall had been built, which completely cut off West Berlin from surrounding East Germany and from East Berlin.  It also came three days before the West German federal election, held on 17 September 1961.

Reinickendorf:    is the twelfth borough of Berlin.  It encompasses the northwest of the city area, including the Berlin Tegel Airport, Lake Tegel, spacious settlements of detached houses as well as housing estates like Märkisches Viertel.

Berlin Schönefeld Airport: Berlin Schönefeld Airport ("   ") (IATA: SXF, ICAO: EDDB) is the secondary international airport of Berlin, the capital of Germany.  It is located 18 km southeast of Berlin near the town of Schönefeld in the state of Brandenburg and borders Berlin's southern boundary.  It is the smaller of the two airports in Berlin, after Berlin Tegel Airport, and is a base for Condor, easyJet and Ryanair.

Germanwings: Germanwings GmbH is a German low-cost airline based in Cologne and a wholly owned subsidiary of Lufthansa.  Its main hubs are Cologne Bonn Airport, Stuttgart Airport, Hamburg Airport, Berlin Tegel Airport and Düsseldorf Airport; further bases are Hannover Airport and Dortmund Airport.

Flughafen Berlin Brandenburg GmbH: Flughafen Berlin Brandenburg GmbH, commonly abbreviated FBB, is a German airport operator.  Currently, it operates Berlin Tegel Airport and Berlin Schönefeld Airport, and is the building owner and future operator of Berlin Brandenburg Airport.

Supporting paragraphs: Berlin Tegel Airport Otto Lilienthal
Answer: 10 August 1896