Save the right whales, Berlusconi is back, a haven for immigrants is tested

Our series looking at the invisible barriers facing some immigrants to the US continues today. It's the "Walls We Don't See." Plus, most Italians thought they'd never see him in politics again. But 81-year-old Silvio Berlusconi is back, despite the fact that's he's technically barred from running for office. Also, marine scientist Charles "Stormy" Mayo tells us about the plight of the right whales, which are in danger of extinction.