21 January 1921 (Italy): The first triple-triplane aircraft, and the first passenger-carrying aircraft designed to carry more than 100 people that actually got off the ground, is launched at Lake Maggiore, Italy. The flight attempt ends in failure when the 55,000 lb. flying boat nose-dives into the lake.

21 January 1952 (Sweden): The SAAB 210 experimental delta-winged research aircraft makes its first flight in Sweden.

21 January 1976 (England & France): First passenger services by a supersonic airliner are begun, as British Airways and Air France Concorde supersonic transports take off simultaneously for Bahrain and Rio de Janeiro.

21 January 1991 (Iraq): First successful combat search and rescue mission of Desert Storm.