Hosted by Jane Pauley. In our cover story, Luke Burbank examines how Butte, Montana, is overcoming a century of environmental damage from its mining industry. Also: Kelefa Sanneh talks with Jennifer Hudson about her portrayal of Aretha Franklin in the biopic, "Respect"; David Martin interviews retired Lt. Col. Alexander Vindman, who testified against President Trump during Congress' impeachment investigation; Lee Cowan learns the life lessons of a new children's book, "Three Little Engines"; Weijia Jiang explores the history of anti-Asian racism in America; Chip Reid visits the Smithsonian's Arts and Industries Building, reopening after nearly 20 years; Serena Altschul pays tribute to MTV on its 40th anniversary; and Tracy Smith visits a "whaling wall" – a life-size depiction of giant sea life by the artist Wyland.

Hosted by Lee Cowan. In our cover story, Conor Knighton visits women who staff fire lookout towers in Klamath National Forest in California. Plus: Lee Cowan talks with students about the intense pressures they feel to succeed academically; Ben Mankiewicz interviews Oscar-winning actress Marlee Matlin, star of the new film "CODA"; Kelefa Sanneh talks with music producer Clive Davis about next weekend's "Homecoming Concert" in New York City's Central Park; Chip Reid visits a unique, interactive museum in Washington, D.C., devoted to language; David Pogue meets a chorus of seniors who perform rock songs; and "Sunday Morning" debuts a new musical film celebrating New York City, called "New York State of Mind."