Pakistan is part of South Asia. It is bounded by India to the east, China to the north, Iran and Afghanistan to the west, and the Arabian Sea to the south. Slightly less than twice the size of California, it features a variety of geographical regions. In the southeast, Sind is a semi-desert region whose main population clusters along the Indus River, and in the northeast, Punjab is fed by five major rivers and serves as the breadbasket of the country. Baluchistan in the west shares Sind's desert landscape in its eastern section but is mountainous in its western region. Finally, the Northwest Frontier Province is home to some of the highest mountains in the world. The boundary that divides Pakistan from Afghanistan is so difficult to navigate that the border, sometimes referred to as the Durand Line, has never been fully surveyed. In addition to these territories...