Barack Obama, second right, joined by his wife Michelle, far left, and daughters Sasha, second left, and Malia, not shown, takes the oath of office from Chief Justice John Roberts to become the 44th president of the United States at the U.S. Capitol in Washington today. (AP Photo/Jeff Christensen)

• Obama appeals for 'hope over fear' in address
• Text of Obama speech

DFO: Let's have a conversation about today's historic events under this posting.