Barack Obama, the United Nations and Global Warming

Secretary General Ban Ki-Moon wants this week's summit of 100 world leaders to set the stage for a conference on greenhouse gas emissions later this year. In today's speech to the General Assembly, President Obama called for action. Because of the worldwide recession, he said, they will all have trouble selling their own capitols on the need for difficult measures. He also conceded that the US has been too slow to recognize the growing danger. But that record, and continued foot-dragging on Capitol Hill, have led to skepticism that he can unite the rest of the world against climate change. We look at Obama's first day at the UN.