By Enas Alashray, Tala Ramadan, Kanishka Singh and Samia Nakhoul CAIRO/WASHINGTON/BEIRUT, July 15 - Iran’s Islamic Revolutionary Guard Corps has threatened to close “all other export corridors that benefit the U.S. and its allies”, Iranian media reported, after Iran shut the Strait of Hormuz and the U.S. reimposed a naval blockade of Iranian ports.