The Durand Line cuts through the Pakistan and Afghanistan, dividing ethnic Pashtuns, who live on both sides of the border. It demarcates Khyber Pakhtunkhwa and Balochistan and Gilgit-Baltistan of northern and western Pakistan from the northeastern, eastern, and southern provinces of Afghanistan. The western end runs to Iran and the eastern end is in western China. From a geopolitical and geostrategic perspective, it has been described as one of the most dangerous borders in the world due to smuggling and terrorism since the 1980s.