It's hard to imagine an American weapons program so fraught with problems that Dick Cheney would try repeatedly to cancel it — hard, that is, until you get to know the Osprey. As Defense Secretary under George H.W. Bush, Cheney tried four times to kill the Marine Corps's ungainly tilt-rotor aircraft. Four times he failed. Cheney found the arguments for the combat troop carrier unpersuasive and its problems irredeemable. "Given the risk we face from a military standpoint, given the areas where we think the priorities ought to be, the V-22 is not at the top of the list," he...