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The album’s final track is a cover of a Puerto Rican jíbaro classic, “La Mujer Sin Corazón,” by La Calandria, a.k.a.

As a first step, in January 2016, workers removed the IR-40’s calandria—the vessel holding the reactor core—and filled it with concrete.

The nuclear deal required Iran to redesign the plant and pour concrete into the pipes of the reactor’s calandria, or core.

“Just yesterday, the foreign minister reported to me that the calandria of the plutonium nuclear reactor is now out and in the next hours it will be filled with concrete and destroyed.”

Iran has said it will downsize the calandria—the vessel in which a core resides—making it harder to later reconfigure the reactor to switch back to natural uranium fuel and produce more plutonium.