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

21K views · 1.3K reactions | "I refuse to accept the view that mankind is so tragically bound to the starless midnight of racism and war." Watch Martin Luther King Jr.'s powerful Nobel Peace Prize speech in which he accepted the award on behalf of the American civil rights movement: https://bit.ly/2IBQvD4 #MLKDay | Nobel Prize | Facebook