The region where these differences first become noticeable lies just south of a chain of mountains called the Vindhya.

CNN: Center Cut

The posts hit by NATO on Saturday are built on the Salala mountain, part of a chain of low-lying rugged mountains that divide Pakistan from Afghanistan.

WSJ: Airstrike Ravages U.S.-Pakistan Ties

Then, they reach a parking area and take a quarter-mile-long path toward the mountains that leads to a couple of acres of ground enclosed by an eight-foot chain-link fence.

NPR: Revisiting the Birth of the Bomb