Even though the billionaire oil industry brothers continue trying to dodge accountability, Rep. Henry Waxman (D-CA) invited the Koch brothers to testify and answer a few simple questions about how the Kochs are positioned to gain financially by the Keystone XL oil pipeline, a 1,700-mile long boondoggle that would make the Koch brothers even richer.

There's ample evidence linking the Kochs' business to the Canadian tar sands, which is the dirtiest energy in North America. Indeed, the Koch brothers' stand to be among the pipeline's biggest beneficiaries. Even the Koch brothers' website confesses to being a party to tar sands oil.