Van Allen Radiation belts contain ionizing radiation will kill anyone that goes above 400 miles from the surface for an extended period without the equivalent of 3 feet of lead.

"So far, the most interesting and least expected result of man's exploration of the immediate vicinity of the earth is the discovery that our planet is ringed by a region–to be exact, two regions–of high-energy radiation extending many thousands of miles into space. This discovery is of course troubling to astronauts; somehow the human body will have to be shielded from this radiation, even on a rapid transit through the region." Dr. James Van Allen, Scientific American, March 1959.

From NASA: NASA's Van Allen Probes Spot an Impenetrable Barrier in Space

NASA Engineer working on Orion. They have to reproduce all of the original rocket designs from Apollo because millions of dollars worth of engineering specs went missing. And they 'lost' the telemetry data and original film of the landing, with grain high enough to be converted to modern HD;

"We still haven't found a way to get past the Van Allen Radiation belts" Nasa engineer working on Orion (2014)

The Apollo 11 Astronauts never left low-earth orbit, and were caught on previously unreleased film using the circular porthole window to fake a distant view of the earth.

A funny thing happened on the way to the moon

"Hidden Gem" Apollo 11 Monkey Business raw unedited

Nasa spent millions building life-like, scale-model movie studios to produce countless hours of video 'simulations' that look exactly the 'official' videos we were shown of the 'real' landing.

Secret Space

NASA Orion testing (2014) confirms;

When Orion briefly touched the inner Van Allen belt, radiation in the crew cabin jumped by orders of magnitude higher than what Apollo reported