Facing a myriad of deadly threats on the battlefield, exploding drones being a particularly serious threat, Russia and Ukraine have both taken extra steps to safeguard their tanks and vehicles by outfitting them with extra layers of protective armor. This improvised armor, sometimes little more than a chain-link cage welded around the outside of a vehicle, is essentially an effort to provide a last-ditch defense against inbound munitions like artillery, anti-tank missiles, or small drones packed with explosives, especially the latter. While both militaries have used such tactics, Russia, in recent weeks, has unveiled a strange-looking — albeit apparently effective...