Obstacles in Safed Koh mountains near Khyber pass between Afghanistan and Pakistan

Afghanistan-Pakistan border: Khyber PassCone-shaped objects in center are called 'dragon's teeth' obstacles similarly used as an anti-tank defense by the Germans during World War II.fortification. (2013). In Encyclopædia Britannica. Retrieved from http://school.eb.com/levels/high/article/110180#57381.tocGrayscaleForman Safety Negatives, Box 2