Who are Iran's key religious and political figures?

A major assault by United States and Israel on Iran has intensified scrutiny of Tehrans leadership structure after Donald Trump urged Iranians to rise against their rulers and Benjamin Netanyahu warned that Supreme Leader Ali Khamenei could be targeted. Khamenei, who succeeded Ruhollah Khomeini in 1989 and holds ultimate authority over Irans military, government and religious establishment, sits atop a complex power hierarchy.