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

First Lady Michelle Obama gave her final speech at the White House Friday. She spoke at a ceremony for high school counselors who demonstrated leadership skills. In her emotional speech, she spoke of the importance of a college education and hope. She told young people, "Don't be afraid. Be focused. Be determined. Be hopeful. Be empowered. Empower yourself with a good education. Then get out there and use that education to build a country worthy of you boundless promise. Lead by example with hop