Cash for Clunkers will end today. It has been a controversial program that stimulated sales for car dealerships, but mostly exchanged American vehicles for foreign vehicles. It took many gas guzzlers off the road and replaced them with more efficient vehicles (in some cases the improvement was negligible), but also destroyed serviceable cars that had plenty of life left in them. The government has been slow to reimburse dealers, who are cash strapped. In the interest of full disclosure, I took advantages of this program myself.

See here for criticisms of the Clunkers program.