system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: What makes it so difficult to intercept ICBMs compared to other types of missiles?
gpt
They're going really high and really fast. They basically travel up into space, around the Earth, and then come back down at a very high speed. Also if there's an all-out nuclear war, there's going to be hundreds (maybe thousands) in flight at once, likely overwhelming your missile defense system.