President Trump said Sunday the U.S. military destroyed nine Iranian warships and is in the process of destroying the rest of Iran's navy. Why it matters: The U.S. strikes target Iran's ability to close the strategic Strait of Hormuz, the narrow waterway through which roughly a fifth of the world's oil supply flows.What he's saying: "I have just been informed that we have destroyed and sunk 9 Iranian Naval Ships, some of them relatively large and important. We are going after the rest. They will...