This week, Bill Moyers speaks with Bill McKibben, the author and activist who has become an ardent environmentalist. At the moment, McKibben is focusing on the proposed Keystone XL oil pipeline – the subject of a new State Department environmental impact study. Before Congress gets a chance to debate its results, McKibben is calling on President Obama to reject the project and defy the powerful oil company lobbyists. Moyers & Company airs from Friday to Sunday on local public TV stations; to find it in your local area, click the BillMoyers.com website.