Billboard charts in 80's -Chapter7-

- Chapter 7 -

1986 year was a very sad year.
Chernobyl nuclear accident and space
shuttle"Challenger" explosion occurred.
The failure was too large though the
failure was necessary for the advance
of science.
However, this failure became lessons to
engineers all over the world.
Then I became an engineer of auto parts
production who thought the safety.
I want to tell it to young mans.