21st Dec 1914.....The UK is bombed by a German aircraft for the first time,two bombs are dropped near the Admiralty Pier,Kent from an Etrich Taube.
21st Dec 1914.....A RNAS Maurice Farman Biplane flown by Wing Commander Charles R.Samson carries out history`s first night bombing raid,attacking Ostend Belgium.
21st Dec 1936.....The first flight of the Junkers JU-88 V1 Prototype D-AQEN.
21st Dec 1945.....Ethiopian Airways is founded.
21st Dec 1955.....Condor Fludienst is founded.
21st Dec 1963.....The first flight of the Hawker Siddeley Andover.
21st Dec 1964.....The first flight of the General Dynamics F-111 takes place,it is the first major combat aircraft with variable geometry wings.
21st Dec 1965.....New York Airways commences helicopter flights from the top of the Pan-Am building to JFK Airport.
21st Dec 1966.....The first flight of the Martin X-23 PRIME
21st Dec 1966.....The longest flight of the A-12 was flown by Bill Park,the 6hr flight covered 10,198 miles.
21st Dec 1968.....Apollo 8 the first manned mission to the moon is launched from Kennedy Space Centre,Florida
21st Dec 1970.....The first flight of the Grumman YF-14A.
21st Dec 1979.....The first flight of the NASA NASA AD-1 Oblique Concept Wing Demonstator at Edwards Air Force Base.
21st Dec 1982.....The last RAF V-bomber Squadron 44Sqn is disbanded at RAF Waddington.
21st Dec 1988.....The first flight of the Antonov AN-225 Mriya.
21st Dec 1988.....Pan-Am flight 103 explodes mid-flight over Lockerbie,Scotland in a terrorist attack.All 259 on board and 11 on the ground are killed.
21st Dec 1990.....Lockheed engineer Kelly Johnson dies at the age of 80.
21st Dec 1993.....The first flight of the Cessna Citation X.
21st Dec 2007.....The first flight of the OMA SUD Skycar...........
https://en.wikipedia.org/wiki/OMA_SUD_Skycar21st Dec 2009.....Spanish Airline,Air Comet ceases operations.