Atheists Open Up: What They Want You to Know

Many Americans are leaving their faith behind. While fewer than 3% consider themselves atheists, about 20% of Americans don't identify with any religion, according to a Pew Study.

CNN's documentary, "Atheists: Inside the World of Non-Believers," tells the story of a number of people who put themselves in that group — and the stigma they've faced.

Read more here.