A landmark 10-year deal world powers signed with Iran to rein in its nuclear programme officially ends Saturday.

But the deal began to fall apart years ago, and wide-ranging United Nations sanctions were reimposed last month on the Islamic republic, effectively burying the agreement but creating space for something new, according to experts.

- What does 'Termination Day' mean? -

The deal's "termination day" was set for October 18, 2025, exactly 10 years after the adoption of resolution 2231, with which the UN Security Council enshrined it.

Officially known as the Joint Comprehensive Plan of Action (JCPOA), the agreement between Iran and China, Britain, France, Germany, Russia and the United States saw the lifting of international sanctions against Iran in exchange for restrictions on T

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