In the background of Azerbaijan’s ongoing blockade of the only road in and out of Nagorno-Karabakh lies the fate of another critical transportation route: the would-be “Zangezur Corridor.” In the ceasefire agreement that ended the 2020 war, Armenia agreed to “guarantee the security of transport connections” between Azerbaijan’s mainland and its exclave of Nakhchivan, allowing “unobstructed movement of persons, vehicles and cargo in both directions” through Armenian territory. More than two…