Before President Obama delivers his farewell address to the nation tonight, take a look back at some of his most memorable speeches — from his keynote during the 2004 Democratic National Convention to his 2012 election victory speech. More on Obama's legacy: http://nbcnews.to/2iRPwUV | NBC News

"It's 'Santa Obama.'" Former President Barack Obama surprised a group of 27 elementary school students at the Bessie Coleman branch of the Chicago Public Library on Tuesday. Obama read the children a book about Bessie Coleman, the first Black woman and Native American woman to hold a pilot license. The former president, who donned a red Santa hat, also talked to students about their aspirations, took a look at the portraits they drew of him and gifted them books, winter hats and gloves. Accordin

President Barack Obama delivers his farewell speech, live from Chicago. | Vox