The latest Gaza war is only a few days old, but already one conclusion can be drawn: missile defense works. This is only the latest vindication for the vision of Ronald Reagan who is emerging as a consensus pick for one of the all-time great U.S. presidents.

For it was Ronald Reagan who made missile defense a major priority for the U.S. and our allies. His 1983 speech on the subject was widely derided as “Star Wars” because he envisioned that some missile would be intercepted in space. For years critics claimed that it was impossible to intercept missiles in flight, or that at the very least it would be prohibitively expensive to do so. But now the U.S. West Coast is actually protected by a limited ballistic-missile defense system based primarily around satellites, sea-based Aegis and X-band radars, and Standard Missile-3 interceptors. We don’t know how the system would work in combat but it has been vindicated in testing.

The U.S. has also cooperated with numerous allies to develop more tactical missiles defenses designed to stop rockets, not in their boost phase, but just before they hit. One of those projects is the Iron Dome system that Israel launched after the 2006 war in Lebanon, during which Hezbollah bombarded northern Israel with thousands of rockets. Today Iron Dome, which is still officially listed as experimental, is operational–and it is blunting Hamas’s missile-offensive against Israel.

According to the Israeli Embassy in Washington: “In the last 4 days: 544 rockets fired from Gaza hit Israel + 302 Iron Dome interceptions = 846 rockets fired at us.” The fact that only 302 of 846 rockets were intercepted (36 percent) might indicate that Iron Dome is ineffective. But in fact it is expressly designed to ignore rockets headed for uninhabited areas. Israeli officials say that 90 percent of the attempted interceptions have worked, thus providing critical protection for civilian areas including Tel Aviv, where an Iron Dome battery has just been moved.

Somewhere, wherever he is now, the Gipper must be smiling.