The British Royal Navy blows up a mine off Ismailia, Egypt, during clearing operations in the Suez Canal on Aug. 30, 1974. (Press Association/AP) President Donald Trump may get his wish of a reopened Strait of Hormuz, but that doesn’t mean the waterway will be safe for transit. The reason: It’s likely lined with mines that take ages to clear. Consider the best historical analogue, the Suez Canal, circa 1974.