Inside Story Americas - Keystone XL: Game over or game on? official

We look at the environmental and political impact if President Obama greenlights the construction of the pipeline. Shihab Rattansi is joined by guests: climate change activist, Bill McKibben, who was among those arrested outside the White House on Wednesday; climate scientist, Alan Robock; and Charles Ebinger, the director of the Energy Security Initiative at the Brookings Institution.