Despite concerns over war and an AI bubble, correspondent Lesley Stahl speaks with Andrew Ross Sorkin about market history and his book 1929; On Nantucket, researchers are testing genetically engineered mice to help fight Lyme disease, as CBS News chief medical correspondent Dr. Jon LaPook explores the project; A young piano teacher is redefining music education with award-winning results, as correspondent Bill Whitaker meets Payam Khastkhodaei to see his unique method.