Space Travel, Peering Under Paintings, America’s Wars

Why are billionaires and private companies so invested in the idea of commercial space flight? Then, the high-tech way conservators at the National Gallery of Art are peeling back the layers of paint on famous masterpieces. And, a military historian says America’s failures in Iraq and Afghanistan have made it clear that our military cannot solve the world’s problems. Also, on today's show: artificial skin that can feel pain; how the lack of spectators at the Olympic Games could affect the competition.