Ziryab : the slave who changed society (ninth century)

Cahokia : the forgotten Rome of the Americas (twelfth century)

Gil Eanes : conquering the point of no return (1434)

Joseph Warren : architect of a revolution (1741-75)

Outdoing Revere : history's forgotten riders (1777)

Elisha Kent Kane : America's greatest hero (1847-57)

The Sultana : death on the Great River (1865)

America's first subway : secrets under Broadway (1870)

Peshtigo : great fire in the forest (1871)

Gustave Whitehead : the first to fly? (1901)

Exercise Tiger : a rehearsal for D-day (1944).