. Заглянула по ссылочке http://www.cia.gov/cia/publications/factbook/geos/pk.html и попутно в соседнюю страну http://www.cia.gov/cia/publications/factbook/geos/af.html в раздел Disputes - international, который посвящен «This entry includes a wide variety of situations that range from traditional bilateral boundary disputes to unilateral claims of one sort or another. Information regarding disputes over international terrestrial and maritime boundaries has been reviewed by the US Department of State. References to other situations involving borders or frontiers may also be included, such as resource disputes, geopolitical questions, or irredentist issues; however, inclusion does not necessarily constitute official acceptance or recognition by the US Government».

А что, линия Дюранда не считается относящейся к «traditional bilateral boundary disputes» ?
Ах ну да, это ж она небось конкретно в госдепе США таковой не считается )).