Also known as the JCPOA, it was an international agreement between Tehran and the US, China, Russia, France, the UK and the EU to limit Iran's nuclear programme in exchange for sanctions relief
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UN says IAEA lost oversight of Iran's nuclear programme
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Vance says Iran nuclear talks to start this week
Talks get off to a shaky start as US and Iran trade threats
Foreign ministers call for permanent US-Iran deal
US-Iran talks start as Israeli strikes in Lebanon stoke tension
US and Iran sign peace deal, with strait to reopen immediately
Donald Trump and the art of the surrender deal
Full text of the 14-point plan to end the US-Iran war