President Barack Obama and Vice President Joe Biden participate in a meeting with the White House Cancer Moonshot Task Force in the Vice President’s Ceremonial Office in the Eisenhower Executive Office Building of the White House, Feb. 1, 2016.

President Barack Obama and Vice President Joe Biden participate in a meeting with the White House Cancer Moonshot Task Force in the Vice President’s Ceremonial Office in the Eisenhower Executive Office Building of the White House, Feb. 1, 2016.

President Barack Obama talks on the phone with Cuba President Raúl Castro in the Oval Office, Sept. 18, 2015.

President Barack Obama talks on the phone with Cuba President Raúl Castro in the Oval Office, Sept. 18, 2015.

April 29, 2015 "Visiting wounded warriors at Walter Reed, the President signed a patient’s military banner at his request."

April 29, 2015
"Visiting wounded warriors at Walter Reed, the President signed a patient's military banner at his request."

April 29, 2015 "An amusing moment as the President made a last minute plea with House Minority Leader Nancy Pelosi, D-Calif., following their meeting at the White House."

April 29, 2015
"An amusing moment as the President made a last minute plea with House Minority Leader Nancy Pelosi, D-Calif., following their meeting at the White House."

April 27, 2015 "I ran up the steps of the Lincoln Memorial ahead of the President and Prime Minister Shinzo Abe of Japan to capture this scene of the two looking towards the Washington Monument."

April 27, 2015
"I ran up the steps of the Lincoln Memorial ahead of the President and Prime Minister Shinzo Abe of Japan to capture this scene of the two looking towards the Washington Monument."

April 17, 2015 "Deputy National Security Advisor Ben Rhodes needed some assistance with his wardrobe so the President joined Brian Mosteller, Director of Oval Office Operations, and Personal Aide Ferial Govashiri in helping to spruce him up."

April 17, 2015
"Deputy National Security Advisor Ben Rhodes needed some assistance with his wardrobe so the President joined Brian Mosteller, Director of Oval Office Operations, and Personal Aide Ferial Govashiri in helping to spruce him up."

April 16, 2015 "The President was about to sign H.R. 2 Medicare Access and CHIP Reauthorization Act of 2015 in the Rose Garden of the White House so we had Lawrence Jackson pre-position on the roof of the Colonnade and he captured this picturesque scene of the President walking to the signing table."

April 16, 2015
"The President was about to sign H.R. 2 Medicare Access and CHIP Reauthorization Act of 2015 in the Rose Garden of the White House so we had Lawrence Jackson pre-position on the roof of the Colonnade and he captured this picturesque scene of the President walking to the signing table."

April 14, 2015 "The Queen of Soul – Aretha Franklin – was waiting for her cue during ‘The Gospel Tradition: In Performance at the White House’ when I noticed her close her eyes in silence for a few seconds while standing in the doorway between the Green Room and East Room before she was ready to begin her performance."

April 14, 2015
"The Queen of Soul - Aretha Franklin - was waiting for her cue during 'The Gospel Tradition: In Performance at the White House' when I noticed her close her eyes in silence for a few seconds while standing in the doorway between the Green Room and East Room before she was ready to begin her performance."

March 31, 2015 "Throughout the first half of the year, the President met often with our team during the P5+1 negotiations with Iran. Several times he conducted secure video conferences from the Situation Room while the negotiators were on the ground in Switzerland."

March 31, 2015
"Throughout the first half of the year, the President met often with our team during the P5+1 negotiations with Iran. Several times he conducted secure video conferences from the Situation Room while the negotiators were on the ground in Switzerland."

March 19, 2015 "I thought it was an interesting juxtaposition focused on just the feet as the President sat on the Resolute Desk during a casual meeting with from left, Beth Cobert, OMB Deputy Director for Management, Valerie Green, Director of Presidential Personnel and Anita Decker Breckenridge, Deputy Chief of Staff for Operations."

March 19, 2015
"I thought it was an interesting juxtaposition focused on just the feet as the President sat on the Resolute Desk during a casual meeting with from left, Beth Cobert, OMB Deputy Director for Management, Valerie Green, Director of Presidential Personnel and Anita Decker Breckenridge, Deputy Chief of Staff for Operations."