Bill Whitaker reports on the battle over rules for mail-in voting in the critical swing state of Pennsylvania that could impact who wins the state and the presidency. Former national security advisor H.R. McMaster tells Scott Pelley the last few presidents — not just President Trump — have left the United States vulnerable to enemies. And what will college football look like during the coronavirus pandemic? Jon Wertheim has the story. Plus -- we pay tribute to Supreme Court Justice Ruth Bader Ginsburg, who died Friday at the age of 87. Those stories on this week's "60 Minutes."

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