Bill Moyers: After the State Department issued a long-awaited environmental impact statement on the controversial Keystone XL pipeline last week, environmentalists and those opposed to the 1,179-mile pipeline have intensified their push for the Obama administration to reject the project. This week, Bill Moyers talks with Bill McKibben, an activist who has dedicated his life to saving the planet from environmental collapse, about his hopes that Americans will collectively pressure Obama to stand up to big oil....