Diane talks marriage and its challenges, both in quarantine and in normal life, with Marlo Thomas and Phil Donahue. The couple, married for 40 years, have a new book called "“What Makes a Marriage Last: 40 Celebrated Couples Share With Us the Secrets to a Happy Life.”

Diane talks marriage and its challenges, both in quarantine and in normal life, with Marlo Thomas and Phil Donahue. The couple, married for 40 years, have a new book called "“What Makes a Marriage Last: 40 Celebrated Couples Share With Us the Secrets to a Happy Life.”

Diane talks with Jeffrey Selingo, author of the forthcoming book "Who Gets In & Why: A Year Inside College Admissions."

Diane talks with Jeffrey Selingo, author of the forthcoming book "Who Gets In & Why: A Year Inside College Admissions."

Diane asks Richard Haass, president of the Council on Foreign Relations and author of "The World: A Brief Introduction."

Diane asks Richard Haass, president of the Council on Foreign Relations and author of "The World: A Brief Introduction."

These are the issues at the heart of the new spy novel by Washington Post columnist David Ignatius.

These are the issues at the heart of the new spy novel by Washington Post columnist David Ignatius.

Diane talks to David Enrich, author of "Dark Towers: Deutsche Bank, Donald Trump, and an Epic Trail of Destruction."

Diane talks to David Enrich, author of "Dark Towers: Deutsche Bank, Donald Trump, and an Epic Trail of Destruction."