On this week's "60 Minutes,"

Seventy-five percent of microchips, the tiny operating brains in just about every modern device, are manufactured in Asia. Lesley Stahl talks with leading-edge chip manufacturers, TSMC and Intel, about the global chip shortage and the future of the industry. Bill Whitaker reports on the regular sightings of unidentified aerial phenomena, or UAP, that have spurred a report due to Congress. And Norah O'Donnell talks to Washington Football Team QB Alex Smith, about his comeback from nearly losing his leg.

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