Ted Koppel on the growing use of artificial intelligence in national security and war; author Hernan Daz; Tracy Smith interviews singer-songwriter Joan Baez; author Marty Baron; the cast of the revival of Stephen Sondheim's "Merrily We Roll Along"; Conor Knighton on a CSI crime lab dedicated to animals; Lee Cowan on the bill passed to keep the federal government open; anonymous
Starts: Jane Pauley, Joan Baez, Marty Baron, Rita Braver, Margaret Brennan, Lee Cowan, Seth Doane, Steve Hartman, Conor Knighton, Ted Koppel