Iran helicopter crash shows Tehran’s reliance on an aging fleet as well as its challenges at home

Read MoreWhile the cause of the May 19 helicopter crash that killed Iran’s president and others remains unknown, the sudden death of the hard-line protégé of Iranian Supreme Leader Ayatollah Ali Khamenei has exposed the contradictions and challenges facing the country’s Shiite theocracyWhile the cause of the May 19 helicopter crash that killed Iran’s president and others remains unknown, the sudden death of the hard-line protégé of Iranian Supreme Leader Ayatollah Ali Khamenei has exposed the contradictions and challenges facing the country’s Shiite theocracy