The price of crude oil has sharply spiked as the Strait of Hormuz has been effectively closed as the United States and Israel wage war on Iran. Oil tankers passing through the Strait of Hormuz "must be very careful," the spokesman for Iran's Ministry of Foreign Affairs warned on Monday. The spokesman, Esmail Baghaei, also defended Iran's attacks on Gulf states, telling CNBC's Dan Murphy that... [2107 chars]