Copyright © 2009 AP
FILE - In this Nov. 25, 2009 file photo, ...
AP - il y a 28 minFILE - In this Nov. 25, 2009 file photo, President Obama speaks during the pardoning of the National Thanksgiving Turkey, Courage, in a ceremony in the North Portico of the White House, in Washington. President Barack Obama is committing the United States to a goal of substantial cuts in greenhouse gas pollution over the next decade when he travels to a widely anticipated climate conference in Copenhagen next month. (AP Photo/Pablo Martinez Monsivais, File)