Blog Post Image: President Barack Obama laughs during the taping of his appearance on the “Late Show with David Letterman” in New York, Monday, September 21, 2009.

Published at 500 × 333 in President Barack Obama laughs during the taping of his appearance on the “Late Show with David Letterman” in New York, Monday, September 21, 2009.

President Barack Obama laughs during the taping of his appearance on the “Late Show with David Letterman” in New York, Monday, September 21, 2009. Official White House Photo by Pete Souza

President Barack Obama laughs during the taping of his appearance on the “Late Show with David Letterman” in New York, Monday, September 21, 2009. (Official White House Photo by Pete Souza)

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