March 29, 2003 Either Take a Shot or Take a ChanceBy DEXTER FILKINS IWANIYA, Iraq, March 28 — At the base camp of the Fifth Marine Regiment here, two sharpshooters, Sgt. Eric Schrumpf, 28, and Cpl. Mikael McIntosh, 20, sat on a sand berm and swapped combat tales while their column stood at a halt on the road toward Baghdad. For five days this week, the two men rode atop armored personnel carriers, barreling up Highway 1. They said Iraqi fighters had often mixed in with civilians from nearby villages, jumping out of houses and cars to shoot at them,...