Russia is repeatedly dropping escalatory hints about possibly using nuclear weapons . It might be bluffing, but what if it is not? Unlike the atomic bombing of Hiroshima and Nagasaki that sealed the surrender of Japan in World War II, if Russia opens another nuclear Pandora’s box, everyone can imagine the rest. Put yourself in Russian President Vladimir Putin’s shoes for a moment. You are convinced this is a proxy war between the United States, its Western allies and Russian forces in Ukraine. Military weaponry of all sorts from Europe is pouring into Ukraine. US intelligence support reportedly helped lead...