[U.S. President Barack Obama pledges a new era of engagement at the United Nations and urges international cooperation on several global isuses in his first address to the U.N. General Assembly].

In his first address to the United Nations General Assembly, President Barack Obama pledges a new era of U.S. engagement at the United Nations and urges other leaders to join in action on several issues including global climate change and economic recovery. He also cautions other countries to give u...

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