September 1, 1939. Hitler's armies invaded Poland, igniting the start of World War Ii.

September 2, 1666. The Great Fire of London began, raging for three days.

September 3, 1783. The Treaty of Paris, ending the Revolutionary War, was signed by John Adams, Ben Franklin and John Jay.

Centuries ago, Europeans desperate for gold and a route to the East found a lush, green paradise populated by native tribes in the New World. Despite a clash of cultures, cooperation created the fur trade that dominated early Michigan history. Subsequent violence and disease all but wiped out the native population. Later, intrepid residents crossed the frozen Straits of Mackinac on foot and then built the famous Mackinac Bridge. The land nurtured Charlton Heston and Ernest Hemingway in their youths and spawned the assassin of President William McKinley. Northern Michigan also bore witness to the sinking of the Edmund Fitzgerald, one of the worst shipwrecks in Great Lakes history.

A CBS correspondent presents an in-depth examination of Russian interference in the 2016 presidential campaign and measures to protect US voting systems against future cyber attacks.

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