NASA's Fallen Heroes remembered - Challenger, Columbia and Apollo 1

NASA delivers a tribute to Challenger, Columbia and Apollo 1 crews on the 35th anniversary of the Space Shuttle Challenger disaster. Features excerpts from speeches made by President Ronald Reagan and George W. Bush. -- The lessons learned from the fatal Challenger shuttle disaster echo at NASA 35 years on: https://www.space.com/space-shuttle-challenger-disaster-35th-anniversary-2021

Credit: NASA