Today isn't just the day for President Obama's second inaugural address -- it's also the Dr. Martin Luther King, Jr., holiday. In formally declaring the holiday, President Obama said in a Friday proclamation that the nation should "celebrate a man whose clarion call stirred our Nation to bridge our differences, and whose legacy still drives us to bend the arc of the moral … [Read more...] about Monday Open Thread: Honoring Dr. King and Celebrating the Second Inaguration