Sept. 22: Secretary of State Hillary Rodham Clinton waits for President Barack Obama's address before the United Nations climate change summit.
Sept. 22: President Barack Obama addresses the Summit on Climate Change at the United Nations.
Sept. 22: President Barack Obama speaks at the summit on climate change at the United Nations headquarters in New York.
Sept. 22: Rajendra Pachauri, chair of the Intergovernmental Panel on Climate Change addresses the summit on climate change at the United Nations
Sept. 22: President Barack Obama accompanied by Rep. Maurice Hinchey, D-N.Y., right, and Rep. Scott Murphy, D-N.Y., arrives in New York for the U.N. General Assembly.
President Obama talks climate change at his first U.N. General Assembly.