Pete Souza Photography

Sen. Barack Obama runs up the steps of the U.S. Capitol. With daughter Malia. Being sworn-in with the Congressional Black Caucus. Kissing daughter Sasha. In his temporary Senate office. With daughter Malia at the Library of Congress. Opening his Springfield, Ill. office. Signing posters in Illinois. Greeting constituents after a town hall meeting in Illinois. With Coretta Scott King and Ethel Kennedy at birthday celebration for Rep. John Lewis. At dedication of Lincoln Library and Museum in Springfield, Illinois. With President Bush et al at dedication of Lincoln Library and Museum. Touring Red Square in Moscow. Just another guy in Moscow. Aboard a military plane headed to inspect former nuclear missile sites. Inspecting dismantled nuclear missiles Inside a dismantled nuclear missile. Waiting while being detained in Perm, Russia due to a bureaucratic snafu. Napping in Perm, Russia. Inspecting dismantled shells. At a biological lab. Anthrax, the plague, and a host of other biological specimens. Disembarking from the military plane. Meeting in the airport lounge. Greeting Ukraine President Yushchenko. Breakfast meeting in Azerbaijan. Sen. Richard Lugar gets all the attention--and the microphones--during a press conference. In Azerbaijan. Riding the Senate subway with Sen. Ken Salazar. At a Capitol Hill event. During a meeting. Meeting with aides. Eating pizza with the interns. In his office. Relaxed while reading in his office. With Ethel Kennedy, RFK's widow. Meeting with then Rep. (now Sen.) Sherrod Brown. Walking onboard a plane. Posing with a flight attendant. Walking through O'Hare Airport. Inside Nelson Mandela's prison cell in South Africa. On Robben Island, where Mandela was imprisoned. Meeting on HIV-AIDS. Outside an AIDS hospital. With Bishop Desmund Tutu in South Africa. Waiting for Obama in Kenya. Obama in Kenya. Reacting to Obama. Obama undergoes a rapid HIV blood test. With his daughter Sasha in Kenya. With his grandmother. Outside a luncheon in Nairobi. Catching a glimpse of Obama. Outside the University of Nairobi. Listening to Obama from loudspeakers outside a speech. Taking notes of Obama's speech in Nairobi. In Kibera, the largest slum in Africa. On safari with his family at the Masai Mara in Kenya. Lion and wildebeest. In Chad, with Sudanese refugees. With Hillary on Capitol Hill. Whispering to McCain at a press conference. Democrats rally at the Library of Congress. After a press conference in New Hampshire. Photographers zoom in on Obama and not the witnesses at a Senate hearing. Obama at a rally in suburban Virginia. Youth rally. Arriving in Springfield, the night before his presidential announcement. Backstage with his family before his announcement. Supporters cheer. Obama after his announcement. At the announcement. Waiting to see Obama in Iowa. Iowa Backstage with strategist David Axelrod. New Hampshire. South Carolina. Michelle and her kids wait behind the stage. Iowa. Iowa. South Carolina. Debate in South Carolina. South Carolina. With John Edwards at Jim Clyburn's fish fry. Iowa. On his campaign bus in Pennsylvania. Bowling in Altoona, Penn. A Secret Service agent keeps watch as Obama lunches on a cheesesteak in Philly. The media entourage. With Michelle on his campaign plane. At Penn State University.