Are you kidding?
There are many things we could do, and do easily, 50-75 years ago that are well beyond our capabilities now.
We could not send two men to walk on the moon and return them safely to earth today, or at any time in the next ten years, for example.
I think we managed 11 manned moon missions with 6 landings in 9 years. The Vietnam war couldn’t stop us but the war on poverty is sure kicking our butts.