The President congratulates Brian Deese

President Barack Obama congratulates Senior Advisor Brian Deese on the first day of the implementation of the Paris Agreement on climate change, in the Oval Office, Oct. 5, 2016. Deese worked with Secretary of State John Kerry and EPA Administrator Gina McCarthy to make the agreement possible. Chief of Staff Denis McDonough watches at left. (Official White House Photo by Pete Souza)

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• October 2016: Photo of the Day