First year of the Chevrolet impala
This is closer still
The monkey went to space
Martinluther king is assassinated
End of viet nam war
Black Panthers civil rights movement ?
It’s gotta be the year Vic Ruggiero, lead singer of the Slackers was born 
Ed Sullivan died .
microwaves become common
Ok, Sesame Street got started in 1969! 
Woodstock happened ?
This is getting very close to the year.
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Separation of church and state?
First super bowl
Before this
The first 747 was used ?
Kent State?
Apollo 7 with manned crew!!
Here is a hint
I am Canadian
1972 longest year?