Bill Cosby trial opens for 2004 sexual assault case

Comedian Bill Cosby began trial Monday in Pennsylvania for the alleged assault of Andrea Constand, whom prosecutors say Cosby, 79, drugged and assaulted at his home in 2004. More than 40 women have accused Cosby of sexual assault over the course of decades, but Constand’s is the only case to head to criminal court. William Brangham learns more from Maryclaire Dale of the Associated Press.