It’s not even 1979
It’s not 1969
It was built in 1959 and put into service in 1964.
Even our country cannot make a Mach 3.3 airplane yet.
The United States was already making something like that in the 1950s.
The United States was already the country that designed and manufactured something like that in the 1950s, when there was no 286, let alone a 286.