15 photos to commemorate the 15th anniversary of Obama's Nobel Peace Prize

So-Sen. Obama, from Illinois, attends his first campaign rally since announcing his candidacy for president on February 20, 2007, in Los Angeles, California. At the time, Obama was voting behind then-Sen. Hillary Clinton, from New York.

Obama arrives with his wife, Michelle, and daughters Malia, left, and Sasha, in Des Moines, Iowa, following his upset victory over Clinton in the state caucuses on January 3, 2008.

Supporters celebrate in Chicago as CNN announces Obama's 2008 victory, making him the country's first black president.

Accompanied by Vice President Joe Biden, Obama signed the American Recovery and Reinvestment Act on February 17, 2009, at the Denver Museum of Nature and Science. The law was a $787 billion stimulus designed to create or save 3.5 million jobs and end the worst state in the US. Economic crisis since the 1930s.

Obama bends down so a White House staffer's son can feel his hair on May 8, 2009. (Official White House photo by Pete Souza.)

Obama received the Nobel Peace Prize at a ceremony in Oslo, Norway, on December 10, 2009.

Obama delivered his first State of the Union address at the U.S. Capitol on January 27, 2010. But I wake up every day knowing they are nothing compared to the setbacks families across the country have faced this year,” he said. “And what keeps me going – what keeps me fighting – despite all these obstacles, is that spirit of determination and optimism, that basic decency that has always been at the core of the American people, that lives on.”

“It lives on in the struggling small business owner who wrote to me at his company: 'None of us are willing to even slightly consider that we might fail,'” he continued. “It's in the woman who said that although she and her neighbors felt the pain of the recession, 'We are strong. We are resilient. We are Americans. It's made up of an eight-year-old boy from Louisiana who sent me his allowance and asked if I would give it to the people of Haiti. And it consists of all the Americans who dropped everything to go to a place that never existed and pulled people they will never meet from the rubble, shouting 'USA'! USA! United States of America!' When another life was saved.”

Obama and Biden receive a standing ovation during the Affordable Care Act signing ceremony in the East Room of the White House on March 23, 2010. Its passage followed a 14-month war, and not a single Republican voted in favor. Now, many of its provisions, such as protection for pre-existing conditions, are widely popular among voters.

Obama stands at the North Pool of the 9/11 Memorial in New York during the 10th anniversary ceremony of the terrorist attacks.

Obama speaks to delegates at the 2012 Democratic National Convention on September 6, 2012 in Charlotte, North Carolina. He won state in 2008 but narrowly lost that year.

Obama speaks during the 50th anniversary celebration of the March for Jobs and Freedom in Washington on August 28, 2013, which ended with Martin Luther King Jr.'s famous “I Have a Dream” speech.

Beige suits arrived at the White House on August 28, 2014

Obama hugs the late Rep. John Lewis, who marched in Selma. They stand on the Edmund Pettus Bridge in Selma, Alabama, on March 7, 2015, for an event marking the 50th anniversary of the Selma to Montgomery Civil Rights March.

Obama waves a rainbow as he boards Air Force One to depart Kingston, Jamaica, April 9, 2015. (Official White House photo by Pete Souza.)

Obama plays with Deputy National Security Advisor Ben Rhodes' daughter on June 4, 2015.

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