Atomic Public Relations

With the latest rounds of rocket fire from Hamas fighters in the Gaza strip, Israel's missile defense system, known as Iron Dome, is getting a lot of press again, much of it positive. As with much reporting on missile defense, however, the Iron Dome coverage has lacked context and misconstrued reality.

A CNN article, for example, carried the headline "How Iron Dome blocks rockets from Gaza, protects Israelis" and described a system that had knocked down 56 rockets fired out of Gaza at a string of Israeli cities. The article suggests that the system is accurate and used "only against rockets headed toward populated areas." It does not suggest that there is any question about the system's effectiveness.

The New York Times, noted for its authoritative reporting, wrote that the Israeli Army contended Iron Dome "intercepted about 27 percent of all the rockets fired between Monday night and midday Wednesday." But the Times did not indicate how many missiles had been targeted, leaving the efficiency of the Iron Dome system in this conflict unclearIsrael has said that the system has a success rate of nearly 90 percent in intercepting the missiles it is meant to thwart." The Times

And less rigorous news outlets were, of course, less rigorous in their analysis. The New York Post, for instance, reported that "Israel foiled Hamas terrorist attacks from the air and sea."

Ted Postol, an MIT-based missile defense expert and frequent Bulletin contributor, provided a dose of context to the Iron Dome coverage in a National Public Radio interview Wednesday. "We can tell, for sure, from video images and even photographs that the Iron Dome system is not working very well at all, " Postol said. "It—my guess is maybe [it hits a targeted missile] 5 percent of the time—could be even lower. And when you look—what you can do in the daytime—you can see the smoky contrail of each Iron Dome interceptor, and you can see the Iron Domes trying to intercept the artillery rockets side on and from behind. In those geometries, the Iron Dome has no chance, for all practical purposes, of destroying the artillery rocket."

Regular readers of the Bulletin are well aware of the long history of inflated claims of missile defense efficiency.

Late in 2012, MIT researcher Subrata Ghoshroy brought some reality to hyperbolic claims about Iron Dome's performance in an earlier Israel-Hamas clash: "Israel seems to have shared little information to date, and so there is no way for observers outside the Israeli defense forces to know how successful Iron Dome actually was."

More important, perhaps, Ghoshroy noted that appraisals of Iron Dome should not be misinterpreted as vindication of defense systems that aim to protect against sophisticated, long-range missiles of the type designed to carry nuclear weapons. His analysis is worth quoting at length: "First, let's debunk the myth that Iron Dome—even if as successful as advertised in the Gaza conflict—constitutes proof that missile defense, writ large, works. Terminology is important here. Iron Dome is primarily a rocket defense system, and rockets are fundamentally different from missiles. Rockets do not have a guidance system; missiles do. Rockets follow a trajectory that is determined by the position and angle of the launcher and the propellant. While destroying a rocket in this way is a great technical feat, it is not the `hit to kill' system on which the US missile defense effort has been premised, and the Iron Dome system is not intended to work against larger ballistic missiles."

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