For even as we celebrate tonight, we know the challenges that tomorrow will bring are the greatest of our lifetime -- two wars, a planet in peril, the worst financial crisis in a century.

CNN: Transcript: 'This is your victory,' says Obama

"We know the challenges that tomorrow will bring are the greatest of our lifetime -- two wars, a planet in peril, the worst financial crisis in a century, " he said on the night of his election victory.

CNN: Obama's rhetoric meets reality