Republican Senator John McCain has been considered somewhat of a maverick by both his critics and supporters. Nowhere is this more apparent than in his stance on global warming. The Bush administration and the Republican party, as a whole, are slow to move to action when it comes to climate change. This hasn't stopped the Arizona senator from being a leading advocate for curbing global emissions. Host Steve Curwood talks with Senator McCain about his climate agenda, and how the issue first came up four years ago on the campaign trail.