Iran's Nuclear Program
January: IAEA confirms Iran is refining uranium to 20% fissile purity
February: UN inspectors end talks in Tehran without inspecting disputed military site at Parchin
April: Iranian President Mahmoud Ahmadinejad vows Iran will not surrender its nuclear rights
May: UN inspectors report finding traces of significantly upgraded uranium at an Iranian site
July: EU begins total ban on Iranian oil imports; US expands sanctions
September: IAEA demands access to Parchin; Iran calls EU sanctions "irresponsible"
December: IAEA says it made progress in talks with Iran; US imposes more sanctions.
January: Iran says it will speed up nuclear fuel work
February: Iran's supreme leader Ayatollah Ali Khamenei rejects direct nuclear talks with the U.S.; Iran, world powers meet, agree to more talks.
May: IAEA says Iran has expanded nuclear activity.
September: Iranian President Hassan Rouhani says Iran will not seek weapons of mass destruction. Iran and world powers agree to resume nuclear talks.
October: Iran set to begin talks with five permanent members of U.N. Security Council and Germany