More than two million U.S. elementary and high school students are home schooled. A mother describes the highs and lows of educating her daughter at home.

In 1912, the 4-year-old son of a wealthy Louisiana family went missing. A legal battle erupted over his identity when he was found months later. His granddaughter Margaret Dunbar Cutright and documentarian Tal McThenia describe the struggle to determine the boy's identity.

Two former CIA agents explain how the techniques they used to catch terrorists and spies can be applied in our daily lives. How to spot a lie and get people to tell you the truth.

The D-Day invasion of Normandy was pivotal to the outcome of World War II. The story of a double agent who helped shape this battle and defeat the Nazis.

In 2003, Pat Tillman wrote a "just in case" letter to his wife before leaving for Afghanistan to serve with the Army Rangers. She recounts how that letter helped her remake her life after his death.

Kevin Bleyer is an Emmy Award-winning writer for "The Daily Show With Jon Stewart" and a joke writer for President Barack Obama. He just published a humorous rewrite of the U.S. Constitution, and joins Diane to discuss what he learned about American history and values along the way.

A wildlife biologist tells the story of a two-day-old Hawaiian monk seal pup that was attacked and abandoned by his mother. It is a portrait of the unique relationship between a member of a critically endangered species and a scientist.

Britain's Queen Elizabeth celebrates 60 years on the throne next month. A new biography looks at the public and private life of a modern monarch.

A daughter tells the story of her mother's escape from the Nazis in World War II and what became of the love she left behind in France.

Diane is joined by veteran presidential election observers Eleanor Clift and Samuel Popkin to discuss what it takes to win the White House.