Why do most movies still fail to reflect U.S. diversity?

In a survey of the 100 top grossing films between 2007 and 2014, 30 percent of all speaking or named characters were women; less than 30 percent of such roles went to actors who were not white. Jeffrey Brown talks to Dylan Marron, blogger for "Every Spoken Word," and Ann Hornaday of The Washington Post about the widespread lack of diversity in Hollywood.