Sniper has D.C. feeling like the hunted 10/13/2002 By JIM MORRIS / The Dallas Morning News WASHINGTON - The mundane task of pumping gas has suddenly become an act of daring, an exercise in evasion. No longer does one stand idly, nozzle in hand, while the tank fills. The 10 sniper shootings since Oct. 2 - four at gas stations - have changed all that. He, or they, could be lurking in the woods, preparing to fell yet another self-service customer. Eight people have been gunned down; two wounded. Now the prudent patron bursts from the driver's seat, rams...