On this special bonus episode of Recode Decode, we look back at our past guests' most insightful comments about diversity in tech and media. Interviewees including Chamath Palihapitiya, Samantha Bee and Dick Costolo explain why discrimination based on sex, age and ethnicity are so common, and what might be done to fix the problem. You can find the full interviews excerpted in this show at Recode.net/Podcasts or in the podcast feeds for Recode Decode and Recode Media.