Parked in the middle of a war funding bill approved by Congress on Thursday is a $1 billion program to give vouchers to consumers who trade in their gas-guzzling clunkers for more fuelefficient models. When the idea surfaced several months ago, much was made of the "C for C" program as a nifty two-fer strategy to jumpstart auto sales and retire climate-destroying and terrorist-empowering gas guzzlers. But the final version that passed Congress this week, and that should take effect by late summer (after NHTSA issues regulations), is much more about clearing sales lots of SUVs and pickups and moving tax dollars to struggling automakers than making a dent in America's thirst for gasoline.