Russian tanks with their tops blown off are just the latest sign that Russia's invasion of Ukraine isn't going to plan. Hundreds of Russian tanks are thought to have been destroyed since Moscow launched its offensive, with British Defense Secretary Ben Wallace on Monday estimating it had lost as many as 580. But Moscow's problems go beyond the sheer number of tanks it has lost. Experts say battlefield images show Russian tanks are suffering from a defect that Western militaries have known about for decades and refer to as the "jack-in-the-box effect." Moscow, they say, should have seen the problem...