A brief history refresher:

1903 First airplane flight.
1919 First Atlantic crossing.

1939 First turbojet flight.
1947 Sound barrier broken.

1944 V-2 Rocket.
1961 First manned space flight.

1952 Sputnik.
1969 Men land on the Moon.

1935 DC-3.
1952 First jet airliner.
1969 First supersonic jet airliner.

Seventeen years is more than enough for a revolution.