One of the most unshakable Pentagon acquisition narratives to emerge from the past decade of war in Iraq and Afghanistan holds that Mine Resistant Ambush Protected vehicles saved lives and were well worth the government's $40 billion investment. The vehicles were introduced into the Iraq war in 2006 to better protect soldiers from improvised explosive devices and have proliferated ever since with the blessing of the Defense Department. But a controversial academic paper surfaced last week challenging the DOD's touted...