A four-part docuseries examining the 1986 Challenger space shuttle, which tragically fell apart 73 seconds after launch when millions of Americans — many of them schoolchildren — were watching live television. The series offers an in-depth look at one of the most diverse crew members NASA has assembled, including high school student Christa McAuliffe, who was selected to be the first private citizen in space. Conversations with the surviving relatives of the crew contribute to the astronauts' portrait. Directors Steven Leckart and Daniel Junge also delve into the "fatally flawed decision-making process" and mechanical failures that led to the disaster, by interviewing former NASA officials and engineers who worked on the failed booster engine and repeatedly worried about its safety. .