On this day 35 years ago, seven astronauts aboard the Space Shuttle Challenger — Ellison S. Onizuka, Mike Smith, Christa McAuliffe, Dick Scobee, Greg Jarvis, Ron McNair and Judy Resnik — died when the spacecraft exploded and broke apart 73 seconds into its launch. *** The MacNeil/Lehrer NewsHour devoted its entire show on Jan. 28, 1986, to cover the tragedy and honor the victims. Here's part of that remembrance. | PBS NewsHour

The Challenger space shuttle tragedy shocked the entire world and reminded everyone of the gravity and intense dangers space exploration really is. Decades later, visiting space as a tourist is now closer than ever, but we must never forget those brave astronauts who risked everything to adventure into the great unknown. Today's epic new video revisits that tragic day and analyzes what caused the Challenger to experience a catastrophic failure. | The Infographics Show

On January 28th, 1986 the Space Shuttle Challenger exploded and broke apart on take off. This week, Destruction Decoded explores the top 10 most dramatic space accidents, from Baikonur to Cape Canaveral. Watch Destruction Decoded on Wednesdays at 8pm, on National Geographic UK. | National Geographic UK