In 1953 the United States CIA along with the British Intelligence Agency MI5 orchestrated a coup to overthrow the democratically elected leader of Iran, Prime Minister, Mohammed Mossadeqh. The British were upset over Mossadeqh's plan to socialize Iran's oil industry. The Eisenhower Administration believed its actions were justified for strategic reasons. Installed was Mohammad Reza Shah Pahlavi, commonly referred to as the Shah. The Shah denationalized the oil industry.