Metal spikes, known as dragon's teeth, and razor wire fortifications on a beach on Yeonpyeong Island, South Korea, with islands belonging to North Korea in the distance, June 26, 2020. On the sleepy island the threat of conflict is constant with North Korean coastal howitzers just 11 kilometres away. Bloomberg
Winston Churchill walking among the 'dragon teeth', the lines of tank defences, of the Siegfried Line during his visit to the 9th Army in Germany, circa 1945. He is accompanied by Field Marshal Bernard Montgomery and Sir Alan Brooke, Chief of the Imperial General Staff. Getty Images
View of pillbox and dragon's teeth tank barrier structures that were part of Germany's Siegfried Line defences during the Second World War. Getty Images
An American WC51 Dodge medic truck on a bulldozed road through rows of 'dragon's teeth' on the Siegfried Line (also known as the West Wall), 1945. The so-called teeth were concrete structures a little more than a metre tall and designed to impede tank movements. Getty Images
Metal spikes, known as dragon's teeth, and razor wire fortifications on a beach on Yeonpyeong Island, South Korea, with islands belonging to North Korea in the distance, June 26, 2020. On the sleepy island the threat of conflict is constant with North Korean coastal howitzers just 11 kilometres away. Bloomberg
Winston Churchill walking among the 'dragon teeth', the lines of tank defences, of the Siegfried Line during his visit to the 9th Army in Germany, circa 1945. He is accompanied by Field Marshal Bernard Montgomery and Sir Alan Brooke, Chief of the Imperial General Staff. Getty Images
View of pillbox and dragon's teeth tank barrier structures that were part of Germany's Siegfried Line defences during the Second World War. Getty Images
An American WC51 Dodge medic truck on a bulldozed road through rows of 'dragon's teeth' on the Siegfried Line (also known as the West Wall), 1945. The so-called teeth were concrete structures a little more than a metre tall and designed to impede tank movements. Getty Images
Metal spikes, known as dragon's teeth, and razor wire fortifications on a beach on Yeonpyeong Island, South Korea, with islands belonging to North Korea in the distance, June 26, 2020. On the sleepy island the threat of conflict is constant with North Korean coastal howitzers just 11 kilometres away. Bloomberg
