Explainer: Ali Larijani, killed in an IDF strike on Tuesday, was a senior figure in Iran's government, overseeing defense and foreign policy. After the death of Khamenei, Larijani

Explainer: Ali Larijani, killed in an IDF strike on Tuesday, was a senior figure in Iran's government, overseeing defense and foreign policy. After the death of Khamenei, Larijani was seen as the power behind the throne. Reporting by @JamesGenn