With the federal government set to shut down at midnight, Pres. Trump is threatening to fire federal workers and cut programs and benefits if Democrats don't back down. Rachel Scott has the latest. https://abcnews.link/WXdjjX2 | ABC World News Tonight with David Muir

Groundbreaking researcher and conservationist Jane Goodall has died at the age of 91. David Muir reports on how her research on chimpanzees changed the way many viewed our closest relative – and the natural world around us. https://abcnews.link/DUN2dcf | ABC World News Tonight with David Muir

The last surviving member to have flown combat missions for the legendary Tuskegee Airmen, George Hardy has passed away. Hardy completed 21 missions across Europe and later flew dozens more missions in both Korea and Vietnam. Linsey Davis reports. https://abcnews.go.com/ | ABC World News Tonight with David Muir