Documents marked “top secret” have been turning up in a lot of unexpected places recently. But America has another problem with classified documents: There’s too many of them. By some estimates, it would take 250 years for these documents to be reviewed and released to the public. On the latest episode of Apple News In Conversation, host Shumita Basu spoke with Matthew Connelly, author of The Declassification Engine: What History Reveals About America’s Top Secrets, about the government’s culture of secrecy. Below are excerpts from the interview.