When workplace conditions put women’s pregnancies at risk

Forty years ago, the Pregnancy Discrimination Act made it illegal for employers to deny a woman a job, a promotion or higher pay because she is pregnant. But a new investigation found cases when workplace conditions put pregnant women at physical risk. William Brangham speaks with Tasha Murrell, who suffered a miscarriage in 2014, and Fatima Goss Graves, CEO of the National Women's Law Center.