Obama was the 44th president of the United States, and he served two terms in office, from 2009 to 2017. During his time as president, Obama helped to bring about some important changes in the country, including the Affordable Care Act (also known as Obamacare), which made health care more accessible and affordable for millions of Americans. He also worked to put an end to the war in Iraq, and to winding down the war in Afghanistan. Obama was awarded the Nobel Peace Prize in 2009, for his work in promoting international peace and understanding.