Seven astronauts lost their lives during the Challenger space shuttle disaster on Jan. 28, 1986. Four decades later, human spaceflight remains a difficult business.

40 years after the space shuttle Challenger disaster, spaceflight remains far from routine

Source: space
Source Link: https://www.space.com/space-exploration/human-spaceflight/40-years-after-the-space-shuttle-challenger-disaster-spaceflight-remains-far-from-routine