Defence using 'dragon teeth' constructed by the Russian Armed Forces poses a significant challenge for the Ukrainian army, as no NATO equipment can break through it, a German TV channel reports.
"The Russians continue to reinforce this huge defense line. We see how many of these 'dragon teeth', it is impossible to count them," Sputnik quoted a fragment of a report by German journalist Julian Repke.
Earlier, Sputnik reported that Russian Defense Minister Sergei Shoigu stated that Russian air defense systems were capable of destroying all F-16 fighter jets sent to Ukraine.