Much like President Kennedy's assassination on 11/22/63 or the terrorist events of 9/11/01, the moment that the space shuttle Challenger exploded just minutes after take-off in 1986 is one of those "where were you when..." moments. This documentary looks back at the tragedy and its context in American culture at the time.
The first two episodes are more history lessons than anything else, setting the groundwork for why the space shuttle program--and Challenger specifically--was a topic of conversation throughout the 1980s. It also examines all the crew members of that fateful voyage, including of course the much-publicized schoolteacher Christa McAuliffe. Your enjoyment mileage may vary for these episodes, as besides interviews with surviving family members they don't bring much more to the table other than context.
The final two episodes, however, really dig into the exact reason behind the malfunction (faulty o-rings) and clearly re-trace a faulty decision-making process from NASA that placed slavish devotion to schedule (and some hubris mixed in) over protecting human life. These episodes are riveting, especially when key NASA players are interviewed for their thoughts after the passage of time. You might be surprised at the recalcitrance of some of them.
Overall, this is a solid and balanced (both context and deep-dive) look at an incredibly sad event. It will bring tears to your eyes on multiple occasions. The access to family members of the astronauts, former high-level NASA officials, and even certain celebrities of the time are the hallmark here, along with a solemn lesson to be learned about the value of safety versus hubris.
