Mark Updegrove talked about his book, Baptism by Fire: Eight Presidents Who Took Office in Times of Crisis, in which he identifies eight presidents who have presided over the country in comparable times of crisis - George Washington, Thomas Jefferson, John Tyler, Abraham Lincoln, Franklin D. Roosevelt, Harry S. Truman, John F. Kennedy, and Gerald Ford. He also discussed lessons President Obama might glean from the legacies of these predecessors, and he responded to telephone calls and electronic mail.