BBC News reports: Iran has removed the core of its Arak heavy-water nuclear reactor and filled it with cement, according to the country’s Fars news agency.

The fate of the reactor was one of the toughest sticking points in Iran’s long nuclear negotiations last year.

Under the terms of the deal, Iran agreed the heavy-water reactor would be reconfigured so it was not capable of yielding material for a nuclear weapon.

The removal of the core is one of the final steps required by the deal. [Continue reading…]