Iran Guards chief says 'finger on trigger', warns US against 'miscalculations'

US President Donald Trump has repeatedly left open the option of new military action against the Islamic republic after Washington backed and joined Israel's 12-day war in June. A fortnight of protests starting in late December shook the clerical leadership under supreme leader Ayatollah Ali Khamenei, but the movement has petered out in the face of a crackdown that activists say has left thousands dead. Guards commander General Mohammad Pakpour warned Israel and the United States "to avoid any miscalculations...