By closing the Strait of Hormuz, Iran has handed the Trump administration a practice test. To pass—and preserve deterrence against a Chinese invasion or blockade of Taiwan—the United States must reopen the Strait decisively and visibly with escorts, minesweepers, and strikes on launch sites.
SAN DIEGO—Most schoolchildren learn that the Earth is roughly 25,000 miles around (40,000 kilometers). They do not learn that the global economy depends on just 100 of those miles.