Celebrated historian David Nasaw discusses his new biography of Joseph P. Kennedy, the founder of the 20th century's most famous political dynasty. Nasaw was granted unrestricted access to the Joseph P. Kennedy papers in the John F. Kennedy Presidential Library, and in The Patriarch: The Remarkable and Turbulent Times of Joseph P. Kennedy he tracks Kennedy's rise from East Boston outsider to supreme Washington insider.

Joseph P. Kennedy, the powerful patriarch of the Kennedy dynasty, died in 1969, but the legacy he left behind has continued to fascinate, and puzzle, historians as well as his own descendants. David Nasaw cuts through the myth surrounding the elder statesman in his new biography, "The Patriarch: The Remarkable Life and Turbulent Times of Joseph P. Kennedy."