A quote from that article that I found interesting...

The U.S. exported 544,000 barrels of distillate a day in November, up from 81,000 in November 2003.
It is a puzzle why a country that imports most of the petroleum it uses would then export a refined product.... Without the diesel exports, what might the diesel fuel pump price be? Supply & demand would seem to indicate a much lower diesel fuel price.....

Jim