system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: Why aren't Nagasaki and Hiroshima nuclear wastelands? Surely they would still be inhabitable due to the radiation?
gpt
Movies have lied to you about the effects and duration of radiation. Most of what movies show about how radiation works are distorted and exaggerated. 

This will also blow your mind: over 500 nuclear bombs have been set off in the US back when we still tested nuclear bombs, some as close as 65 miles away from las vegas or other cities.