The US and Iran: Why the Bad Blood?

Why It Matters

The timeline shows how decades of interventions and mutual antagonism have shaped current geopolitical tensions and regional instability, with implications for U.S. policy, Middle East security, and global energy and diplomatic risks.

Summary

The video traces U.S.-Iran hostility from the 1953 CIA-backed removal of democratically elected Prime Minister Mohammad Mossadegh and the installation of the U.S.-supported Shah, through the Shah’s repressive rule and the 1979 Islamic Revolution led by Ruhollah Khomeini. It highlights the 1979 U.S. embassy hostage crisis, the U.S. backing of Iraq during the bloody 1980–88 Iran–Iraq War, and the succession of Ali Khamenei after Khomeini’s death. The narrator frames these events as a deepening cycle of resentment and retaliatory actions that, the video claims, culminated in a recent U.S. and Israeli strike killing “Ali Kame.”

Original Description

On Saturday, the US and Israel attacked Iran and killed Supreme Leader Ali Khamenei. Now, US President Donald Trump wants to have a say in picking Tehran’s next leader – one who is willing to work with the United States.

But what is the origin of the bad blood between Washington and Tehran? GZERO’s Senior Reporter Zac Weisz runs through the history of US-Iran hostilities.