Summary: <p>The Federal Reserve announced a new, open-ended round of bond buying to stimulate economic growth. President Barack Obama and Republican challenger Mitt Romney sparred over the Obama administration's handling of the attacks in Libya and Egypt. And vice presidential candidate Paul Ryan returned to the House to vote on a six-month, stopgap spending bill to keep the government operating. Jonathan Allen of Politico, Jackie Calmes of The New York Times and Michael Scherer of TIME magazine join Diane for analysis of the week's top national news stories.</p>
