On this week's "60 Minutes," Scott Pelley travels to Austin, Texas, where the city is reforming its police department. This comes amid calls for defunding law enforcement over deadly encounters between citizens and police across the country. Will supersonic passenger planes fly again? Bill Whitaker reports on two new efforts to revive supersonic commercial flights. The gardens of the Roman Emperor Caligula have been discovered and excavated, and some of the most remarkable finds are now on display for the first time. Anderson Cooper takes a look.

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