It's been 20 years since the debut of NBC's hit mockumentary sitcom The Office. To celebrate the anniversary, we're listening back to Terry Gross' archival interviews with some of the key players: Steve Carell, Jenna Fischer, John Krasinski, Rainn Wilson, Mindy Kaling and executive producer Greg Daniels. We'll also hear from Ricky Gervais, who co-created and starred the original British version.