Lasrick (2629253) writes In a controversial article last week, MIT physicist Ted Postol again questioned whether Israel's vaunted Iron Dome rocket defense system actually works. This week, he comes back with evidence in the form of diagrams, photos of Iron Dome intercepts and contrails, and evidence on the ground to show that Iron Dome in fact is effective only about 5% of the time. Postol believes the real reason there are so few Israeli casualties is that Hamas rockets have very small warheads (only 10 to 20 pounds), and also Israel's outstanding civil defense system, which includes a vast system of shelters and an incredibly sophisticated rocket attack warning system (delivered through smart phones, among other ways).
We warn the reader in advance that the proof presented here depends on a
clever but highly unmotivated trick.
-- Howard Anton, "Elementary Linear Algebra"