The campaign that Trump launched in conjunction with Israel has so far depended on superior air power and detailed intelligence about which targets to hit. But Iran has multiple ways to imperil vessels in the Strait of Hormuz. The country is a major producer of cheap aerial drones—which Russia has used to deadly effect against Ukraine over the past four years. Iran also seems to be using sea drones and, according to some reports, may be laying mines in the strait. Many of the systems used to deploy such weaponry are small and easily transportable, so tracking them down is not easy. Doing so requires constant air patrols, and even with those, some Iranian equipment will slip through.