EVB2947720: President Barack Obama and PM Benjamin Netanyahu of Israel in the Oval Office. The leaders differed over negotiations with Iran on its Nuclear program. Mr. Netanyahu expressed deep skepticism that international pressure would persuade Iran’s leaders to forsake the development of nuclear weapons. March 5, 2012 / Bridgeman Images

EVB2947729: President Barack Obama near the Treasury at the ancient city of Petra in Jordan. March 23, 2013. Al-Khazneh (The Treasury) is one of the most elaborate temples in the ancient city of Petra. This structure was carved out of a sandstone rock face / Bridgeman Images

EVB2947735: Nuclear Security Summit in Seoul, Republic of Korea. Meeting between Prime Minister Yousaf Raza Gillani of Pakistan and President Barack Obama, March 27, 2012 / Bridgeman Images

EVB2947736: Barack Obama talks with President Asif Ali Zardari of Pakistan before a meeting on Afghanistan. They were attending a NATO Summit in Chicago, Ill., May 21, 2012 / Bridgeman Images

EVB2947737: President Barack Obama walks with President Mahmoud Abbas of the Palestinian Authority. Ramallah, the West Bank, March 21, 2013 / Bridgeman Images

EVB2947738: President Barack Obama visits the Church of the Nativity in Bethlehem, the West Bank, Palestine. He lights candles with Greek Orthodox priests / Bridgeman Images

EVB2947740: Presidents Barack Obama and Dmitry Medvedev of Russia meeting in Prague Castle. Czech Republic, April 8, 2010 / Bridgeman Images

EVB2947742: President Barack Obama bids farewell to Russian President Dmitry Medvedev. They were attending the Parallel Business Summit at the Manezh Exhibition Hall in Moscow, Russia, July 7, 2009 / Bridgeman Images

EVB2947750: First Lady Michelle Obama meets with former President Nelson Mandela of South Afric. At Mandela's home in Houghton, South Africa, June 21, 2011. Mandela holds a book, 'Mandela by Himself, The Authorized Book of Quotations' / Bridgeman Images

EVB2947767: President Barack Obama and First Lady Michelle Obama visit Poets' Corner. Westminster Abbey in London, England, May 24, 2011 / Bridgeman Images

EVB2947769: President Barack Obama tours the House of Commons Members' Lobby at Parliament in London. Commons Speaker John Bercow, and Lords Speaker Baroness Haymanare his guides. May 25, 2011 / Bridgeman Images

EVB2947777: President Barack and Michelle Obama look at the Chicago skyline, June 15, 2012. The Obama's married there in 1992 and it was their home and political base before he elected President / Bridgeman Images

EVB2947782: Michelle Obama and Dr. Jill Biden at Game 1 of the World Series in St. Louis, Mo. Oct. 19, 2011. They were joined during the national anthem by Marine veteran James Sperry and his daughter, Hannah / Bridgeman Images

EVB2947788: Obama Family Portrait, Dec. 11, 2011. President Barack Obama, First Lady Michelle Obama, and their daughters, Malia, left, and Sasha, right / Bridgeman Images

EVB2947799: President Barack Obama and Michelle Obama embrace after the official swearing-in ceremony. The ceremony was held on Sunday, Jan. 20, 2013, according to the constitution, the day before the public inauguration at the Capitol. To Right are Malia and Sasha and Supreme Court Chief Justice John G. Roberts, Jr / Bridgeman Images

EVB2947800: Barack Obama Inauguration Ceremony, 21st January 2013 (photo), Unknown photographer, (21st century) / Bridgeman Images

EVB2947802: President Barack Obama and First Lady Michelle Obama ride in the inaugural parade. Washington, D.C., Jan. 21, 2013. Thom Browne, designed Michelle's tailored navy silk jacquard coat / Bridgeman Images

EVB2947806: First Lady Michelle Obama poses with former First Ladies, April 25, 2013 (photo) / Bridgeman Images

EVB2947807: President Barack Obama poses with former Presidents, April 25, 2013 (photo), Unknown photographer, (20th century) / Bridgeman Images

EVB2947817: Commemoration ceremony at the National September 11 Memorial in New York City. President Barack and Michelle Obama, with former President George W. and Laura Bush, list to a speaker on the 10th anniversary of the 9/11 attacks / Bridgeman Images

EVB2947819: Commemoration ceremony at the National September 11 Memorial in New York City. President Barack and Michelle Obama, with former President George W. and Laura Bush, walk along the North Memorial Pool. Sept. 11, 2011 / Bridgeman Images

EVB2947824: President Barack Obama confers with top advisors prior to the announcement of the New START Treaty / Bridgeman Images

EVB2947846: President Barack Obama is hugged by a woman during a Labor Day celebration. Sept. 5, 2011 / Bridgeman Images

EVB2947857: Dianne Reeves performs at the White House during the National Governors Association Dinner. Feb. 26, 2012 / Bridgeman Images

EVB2947866: Aerial view of World Trade Center from the southwest, Sept. 27, 2001. Orange reinforcing plastic covers the street facades of severely damaged buildings on Church Street. New York City, after September 11, 2001 terrorist attacks / Bridgeman Images

EVB2947869: Actors Susan Sarandon and Tim Robbins serving meals at feeding stations for workers at Ground Zero. Sept. 27, 2001. World Trade Center, New York City, after September 11, 2001 terrorist attacks / Bridgeman Images

EVB2947872: People of Bikini Atoll carry their belongings down to boat. 40 families were 'temporarily' moved to Rongerik Atoll on March 7, 1946. Their displacement was permanent, because the BAKER atomic explosion and following tests, irradiated the Bikini Island, making it uninhabitable. 23 nuclear devices were detonated in the Bikini vicinity between 1946 and 1958 at seven test sites / Bridgeman Images

EVB2947876: Aerial view of Ground Zero from the northwest on a hazy day, Oct. 4, 2001. At upper left is the Brooklyn Bridge, and at upper right is Governor's Island. World Trade Center, New York City, after September 11, 2001 terrorist attacks / Bridgeman Images

EVB2947888: Construction workers maneuver the last piece of debris removed from Ground Zero. May 28, 2002. It was the 30-foot 'Column Number 1001B' of Two World Trade Center (South Tower). The steel beam, one of 47 that held up the South Tower, was plastered with mass cards, rosary beads, flags, photos of missing innocents, and letters from children to parents who would never be coming home. It is in the National Sept. 11 Memorial & Museum. U.S. Navy Photo by Bob Houlihan / Bridgeman Images

EVB2947889: Tribute in Light Memorial illuminates a passing cloud above lower Manhattan. Sept. 9, 2004. The twin towers of light, made-up of 44 searchlights near Ground Zero, represent the fallen twin towers of the World Trade Center. U.S. Coast Guard photo by Mike Hvozda / Bridgeman Images

EVB2947892: World Trade Center Ground Zero site under reconstruction, Nov. 2, 2009. In right foreground is the new WTC 7. In the Hudson River is the USS NEW YORK, built with 7.5 tons of steel from the World Trade Center in her bow. U.S. Navy Photo by Specialist Eric M. Durie / Bridgeman Images

EVB2947897: President George W. Bush and senior staff on phones after learning of the 9-11 Terrorist Attacks. President Bush spoke with New York Governor George Pataki, FBI Director Robert Mueller and Vice President Dick Cheney. The group is still at Emma E. Booker Elementary School in Sarasota, FL. At left is Andy Card, Chief of Staff / Bridgeman Images

EVB2947909: National Security Council on Sept 12, 2001 / Bridgeman Images

EVB2947912: Oval Office press conference on Sept. 13, 2001, 2 days following the 9-11 Terrorist Attacks. President George W. Bush talks with reporters after his telephone call to NY Gov. George Pataki and NYC Mayor, Rudolph Giuliani / Bridgeman Images

EVB2947915: National Day of Prayer and Remembrance service on Sept. 14, 2001 (photo) / Bridgeman Images

EVB2947921: President George W. Bush waves an American flag after addressing recovery workers in NYC. Sept. 14, 2001. With Bush is retired New York City firefighter Bob Beckwith / Bridgeman Images