HAPPENING NOW: HHS Secretary Robert F. Kennedy Jr holds a news conference on women’s health. https://abcnews.link/tUte2YS | ABC World News Tonight with David Muir

HAPPENING NOW: House Minority Leader Jeffries holds a news conference amid the government shutdown. https://abcnews.go.com/Politics/live-updates/government-shutdown-live-updates/?id=127124906 | ABC World News Tonight with David Muir

David Muir speaks with his ABC News 20/20 co-anchor Deborah Roberts to discuss her new book, ‘Sisters Loved and Treasured: Stories of Unbreakable Bonds.’ She opens up about the stories that shaped her life, and the sisters she shared those moments with. https://abcnews.link/6AJzfWD | ABC World News Tonight with David Muir

Temperatures are expected to plummet into the 20's and 30's as a major Arctic blast moves in from the Midwest to the Deep South and the East Coast. Some morning low temperatures could break records across the South. Lee Goldberg tracks the cold blast. https://abcnews.link/SP3tAdu | ABC World News Tonight with David Muir