CNN: Tens of thousands of people marched through Manhattan sounding an urgent call for action to reverse global climate change Sunday. One marcher's sign read "cut your emissions or you'll sleep with the fishes." The "People's Climate March" in New York was billed as the largest of several protests held around the world two days before the start of the United Nations' Climate Summit. U.N. Secretary General Ban Ki-moon walked with former U.S. Vice President Al Gore along the two-and-a-half mile route....