Mohammad Massadeq, overthrown Iranian prime minister
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US-Iran relations: A guide to 60 years of tricky relations

18 June 2014 Last updated at 17:25 BST

US-Iran relations have been in the spotlight once again as the Iraq crisis has unfolded this week.

From the CIA-orchestrated overthrow of Iran's prime minister in 1953 to a phone call between Presidents Obama and Rouhani and possible direct talks on Iraq's security,

BBC News looks at more than 60 years of tricky relations between Iran and the US.