The great David McCullough discusses how his three books -- "The Great Bridge," "The Wright Brothers," and "The Path Between the Seas" -- represent an unofficial trilogy about the American spirit, ingenuity, engineering, and courage. History lessons like this right to your mailbox each month. Subscribe: http://bit.ly/1RUXzZQ | History in Five

Historian David McCullough died recently at the age of 89. The Pulitzer Prize-winning historian appeared on C-SPAN over 75 times. His biographies of Harry Truman and John Adams were bestsellers. You can watch him discuss his many books anytime online: https://c-span.org/person/?6130/D | BookTV