Three million open jobs in U.S., but who's qualified?

FROM CBS NEWS - 60 Minutes:
Every month since January 2009, more than 20 million Americans have been either out of work or underemployed. Yet despite that staggering number, there are more than three million job openings in the U.S. Just in manufacturing, there are as many as 500,000 jobs that aren't being filled because employers say they can't find qualified workers.

It's called "the skills gap." How could that be, we wondered, at a time like this with so many people out of work? No place is the question more pressing than in Nevada. The state with the highest unemployment rate in the country. A place where there are jobs waiting to be filled.