I remember about the time Apollo 11 landed, the Russians had some kind of non-manned thing crash on the moon
Apollo 1 fireOn Jan. 27, 1967, a fire ignited in the Apollo 1 command module in the middle of a launch rehearsal. All three astronauts inside the module — Roger Chaffee, Ed White and Virgil "Gus" Grissom — died in the blaze.
An investigation later found that a stray spark, likely from damaged wires, started the fire. The module's pure-oxygen environment and flammable interior fed the conflagration. And the astronauts couldn't escape, because the hatch door opened inward and the pressure inside from the fire was so great that the astronauts couldn't pull the door open.
"It [the fire] both threatened the [Apollo 11] mission and made the mission possible," said Robert Pearlman, a U.S. space historian and the founder and editor of collectSpace. "It did set back the program for a year; they didn't fly again until 1968. But it also gave NASA the opportunity to step back, rethink its priorities."
NASA redesigned the hatch and enacted other safety measures, which ensured that the Apollo 11 mission wouldn't face similar obstacles in space.