This came up by way of my Patriotic Hero idea. However, I am unsure exactly how to do this, because I am more used to writing longer stories. Here is my opening salvo :)
The silent figure, clad in battle dress and covered in scent masker, held himself prone and motionless. He lay on an impossibly small chunk of rock, that seemed to be nothing but sharp spikes jutting into his legs and torso. Blending into the bleached butte, he overlooked a road which was nothing more than spaces between the rocks wide enough for light cargo trucks. Openings to the caves could be seen in the almost nonexistant light, on the other side of the road. The figure could see them quite clearly, as his vision had been rated at 20/5, and he possessed extraordinary night vision. He could see things that other men needed night vision goggles to discern.
He waited for the target, breathing very lightly...