ENCORE – Lee Cowan looks at how artificial intelligence will allow fans of country music legend Randy Travis, who largely lost his cherished singing voice after a stroke, to hear new music from him again.TOM SELLECK – Tracy Smith catches up with actor Tom Selleck to discuss his new book and work on the hit CBS drama BLUE BLOODS.ON DISPLAY: BOB SCHIEFFER – Sharyn Alfonsi of 60 MINUTES visits with legendary CBS anchor and correspondent Bob Schieffer about a new exhibit of his artwork.LEGENDS: WHOOPI GOLDBERG – Seth Doane talks with Whoopi Goldberg about her life, career and new memoir, Bits and Pieces: My Mother, My Brother, and Me.NOVA – Martha Teichner tours a new exhibit based on the Israeli rock festival where concertgoers were killed during the attack by Hamas.WE THE PEOPLE … John Dickerson talks with author A.J Jacobs about the year he spent living constitutionally by following the letter of the U.S. Constitution for his new book, The Year of Living Constitutionally: One Man's Humble Quest to Follow the Constitution's Original Meaning.SPACE COPTER – David Pogue reports on a technical marvel: a small helicopter attached to NASA's Mars rover that is the first vehicle to fly on another planet.