The first filter that is applied to the height map is a simple Gaussian blur, which the GPU handles with ease, but which -- if left to its own devices -- would simply smooth out all the dramatic extremes in the height map and leave us with a bunch of bland rolling hills.

ENGADGET: Primed: The crazy science of GPU compute Mobile

But according to the new U.S. account, a serviceman talking to the border-control center, attempting to make the coordinates more specific for the Pakistanis by pairing them with a map of the political border, applied an incorrect electronic overlay on his computer.

WSJ: U.S. Erred in Deadly Attack

The driver claimed to be using the phone for mapping purposes and argued that the state's distracted driving laws shouldn't have applied (he says he was looking at a map on the phone while holding it in his hand).

CNN: Judge rules using smartphone maps while driving illegal