NASA delaying Artemis II rocket launch to moon
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Seven astronauts lost their lives during the Challenger space shuttle disaster on Jan. 28, 1986. Four decades later, human spaceflight remains a difficult business.
NASA's space shuttle Challenger completed 10 missions before it broke apart during a launch in 1986, killing seven astronauts.
The agency did not complete a practice countdown for a mission that would be the first to send people around the moon in more than 50 years.
NASA's space shuttle Challenger exploded and broke apart Jan. 28, 1986, in the sky over East-Central Florida, killing the seven astronauts on board.
Forty years later, the memories of the Challenger explosion resonate deeply with students and teachers who witnessed it.