The biggest issue with the moon landings over 50 years ago, using 3 computers that are lower spec than in the average modern washing machine, is why can the feat not be easily repeated in the 21st century, with vastly far superior tech, and knowledge, in every single field of expertise? The usual excuse is always that NASA, and all the other space agencies, don't have the funding. And for some reason, all the technical/scientific analysis from 50 odd years ago cannot be used in the 21st century, as somehow space has fundamentally changed over the last fifty years, in a universe that is estimated to being over 13 billion years old, on a planet which is estimated to be 4.5 billion years old, making it even more nonsenical than global warming, cough climate change! Please describe one other human race defining feat, acheived 50 years ago, that is so difficult to repeat and delayed repeatidly, by USA, China, India, Japan, Russia, and the United Arab Emirates?