Russia’s supposedly impenetrable ammunition arsenal has fallen victim to one of the most devastating drone strikes of the Ukrainian war.According to Ukraine’s military intelligence, 100 drones were involved in the strike in Toropets, Russia, which caused 13 explosions, sparking a blast which carried the power of 200 tonnes of high explosives.The blast could potentially be one of the biggest non-nuclear explosions in history, as powerful as a series of earthquakes.