President Barack Obama demonstrates "the SOCCKET Ball," which uses kinetic energy to provide power to charge a cell phone or power a light, during an event at the Ubungo power plant July 2, 2013, in Dar es Salaam, Tanzania.
President Barack Obama looks out the window on Sunday, June 30, 2013, from the cell where Nelson Mandela, an anti-apartheid activist who was eventually released and won the Nobel Peace prize for his efforts, was once jailed on Robben Island.
President Barack Obama and first lady, Michelle, look out from the Door of No Return on June 27, 2013. The door, what African slaves once passed through when they were shipped off the continent, was part of their tour at the House of Slaves on Goree Island in Senegal.
Ulrich Grillo, president of the Federation of German Industries, toasts his glass next to President Barack Obama at a dinner at the Orangerie at Schloss Charlottenburg palace on June 19, 2013 in Berlin, Germany.
President Barack Obama holds up a stuffed bear that New Jersey Gov. Chris Christie won tossing a football on the boardwalk during their visit Tuesday, May 28, 2013, to Point Pleasant, N.J., to survey progress after Hurricane Sandy.
President Barack Obama laughs with former Presidents Jimmy Carter, Bill Clinton, and George W. Bush prior to the dedication of the George W. Bush Presidential Library and Museum in Dallas, Texas, on April 25, 2013.
President Barack Obama signs letters from children backstage after signing executive orders and unveiling new gun control proposals as part of the administration’s response to the Newtown, Conn., shootings, and other tragedies on Jan. 16, 2013.
President Barack Obama pauses during a meeting to observe a moment of silence in the Oval Office in remembrance of the 20 children and six adults killed in the Sandy Hook Elementary School shooting in Newtown, Conn.
The President is caught in "Spiderman's" web as he greets Nicholas Tamarin, 3, just outside the Oval Office. Tamarin had been trick-or-treating for an early Halloween with his father White House aide Nate Tamarin in the Eisenhower Executive Office Building.
During the winter the sun is low on the horizon and splashes through the back window in the Oval Office in the early morning and late afternoon. In this photo, President Barack Obama talks on the phone with British Prime Minister David Cameron.
President Barack Obama meets privately with Damien and Glenda Moore at a FEMA Disaster Recovery Center tent in Staten Island, N.Y. The Moore’s two children died after being swept away during Superstorm Sandy.
Barack Obama and first lady Michelle wave goodbye to President Shimon Peres of Israel on the North Portico of the White House following the Presidential Medal of Freedom ceremony and dinner in his honor.
Barack Obama has lunch with members of the Congressional Leadership in the Oval Office Private Dining Room. The President served hoagies from Taylor Gourmet, which he purchased after a small business roundtable earlier in the day.
Barack Obama jokes with Senior Advisor Valerie Jarrett backstage before delivering remarks on the economy at the College of Nanoscale Science and Engineering at the State University of New York in Albany.
Barack Obama does push-ups on the White House Basketball Court after a member of the Harlem Globetrotters made a shot. The President participated in "Shoot for Strength", a game where children did push-ups for every basketball shot made by the pros, during the 2012 White House Easter Egg Roll festivities.
President Barack Obama visits the Dubliner, an Irish pub in Washington, D.C., with his Irish cousin, Henry Healy, center, and Ollie Hayes, a pub owner in Moneygall, Ireland, right, on St. Patrick's Day.
Obama and Massachusetts Governor Deval Patrick listen as students from Orchard Gardens K-8 School in Roxbury, Mass., perform Dr. Martin Luther King Jr.'s "I Have a Dream" speech in the Diplomatic Reception Room of the White House.
Obama joins in singing "Sweet Home Chicago" during the "In Performance at the White House: Red, White and Blues" concert in the East Room of the White House. Participants include, from left: Troy "Trombone Shorty" Andrews, Jeff Beck, Derek Trucks, B.B. King, and Gary Clark, Jr.
Obama reacts as 14-year-old Joey Hudy of Phoenix, Ariz., launches a marshmallow from Hudy's "Extreme Marshmallow Cannon" during a tour of the White House Science Fair in the State Dining Room of the White House.
Obama participates in an interview with YouTube and Google+ to discuss his State of the Union address in the Roosevelt Room of the White House,. The interview was held through a Google+ Hangout, making it the first completely virtual interview from the White House.
Obama talks to Secret Service Uniformed Division officers as he walks through the magnetometer in the Northwest Gatehouse at the White House, following his visit to Blair House. The President told a reporter as he exited the gatehouse, "I just wanted to see what it was like getting in here."
The President and Bo, the Obama family dog, ride in the presidential motorcade en route to PetSmart in Alexandria, Va. The President bought Bo some Christmas gifts at the pet store then walked nearby to Best Buy to purchase gifts for his daughters.
Janet Kavandi, Director of Flight Crew Operations at Johnson Space Center, presents Obama with a jacket during a drop by with the crew of the Space Shuttle Atlantis in the Oval Office. The jacket features patches from several past space shuttle missions.
Obama and first lady Michelle along with former President George W. Bush and former first lady Laura Bush pause at the North Memorial Pool of the National September 11 Memorial in New York City on Sept. 11, 2011.
Obama and Vice President Joe Biden are briefed by Rob Nabors, Assistant to the President for Legislative Affairs, during a meeting in Chief of Staff Bill Daley's office in the White House to discuss ongoing efforts to find a balanced approach to the debt limit and deficit reduction.