President Barack Obama and Dan Pfeiffer disembark Air Force One

President Barack Obama and Dan Pfeiffer disembark Air Force One upon arrival at Joint Base Andrews, Md. on Pfeiffer's last day as Senior Advisor to the President, March 6, 2015. Pfeiffer had joined President Obama on his trip to Columbia, South Carolina. (Official White House Photo by Pete Souza)

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• March 2015: Photo of the Day