How to keep your eyes safe during the solar eclipse

More than 31 million Americans live in the path of next week’s solar eclipse, but observing it could threaten your eyesight if you don’t take proper precautions. Former NASA astronaut Mike Massimino, a professor of mechanical engineering at Columbia University, joined CBS News with safety tips before observing the eclipse. And CBS News correspondent Nancy Chen reports that millions of people are expected to travel to see the solar event.