system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: What is the Iran-Contra affair?

I've never gotten a succinct explanation of this.
gpt
The CIA illegally sold weapons to Iran, then used the money to illegally fund rebels (the Contras) in Nicuragua. Then everyone in the administration that knew about it (Such as Reagan and Bush) lied about knowing about it.