After 12 years of talks, it seems Iran has agreed to scale back its nuclear programme in exchange for the lifting of UN sanctions that have crippled the country’s economy.
So how does the proposed deal stack up?
Getting this far has been a process that has taken over a decade, as Channel 4 News International Editor Lindsey Hilsum explains.
2003 Mohammed Khatami, a reformer, is Iranian PM. Negotiations on the country’s nuclear programme begin. (Jack Straw, British FM, takes a lead role. His chief negotiatior is John Sawers, later head of MI6)
2005 Hardliner Mahmoud Ahmadinejad is elected President
2006 Iran announces that it has enriched uranium for the first time
2007 UNSC 1747 imposes sanctions against Iran for nuclear programme
2008 UNSC 1803 imposes further sanctions
2009 Rigged elections return hardliner Mahmoud Ahmadinejad to power. Vast protests are quashed. Western intelligence services uncover Fordow, a secret enrichment facility dug into the mountains near Qom.
2010 Further UN sanctions are imposed. Several Iranian nuclear scientists are murdered. Suspicion falls on Israel. Stuxnet, a computer virus, is identified as aimed at Iranian nuclear facilities.
2011 More Iranian scientists are killed.
2012 EU imposes oil sanctions. Netanyahu gives UN speech holding crude diagram of an egg timer showing alleged time before Iran has a bomb.
2014 Joint plan of action between Iran and P5+1 agreed. Iran suspends uranium enrichment.