Mark Perry discusses the bizarre case of the Stryker, a vehicle used by the U.S. army to transport infantry troops to the battlefield. The Stryker, Perry explains, is a deathtrap: it isn't heavily armored enough to stand up to real combat, it rolls over easily and it can't withstand IEDs or tank rounds. What's more, everyone seems to know this. And yet the Pentagon is spending nearly a billion dollars on a new contract, not to give the Stryker better armor, but to put machine guns on it. Perry describes this as putting a tourniquet on the wrong part of the body, and is emblematic of the kind...