Tuesday marks the 34th anniversary of the Space Shuttle Challenger tragedy.
The shuttle exploded 73 seconds after takeoff on Jan. 28, 1986.
Teacher Christa McAuliffe was among the crew members killed on the Challenger. She was the first civilian teacher ever chosen for a space mission.
Crew members Dick Scobee, Mike Smith, Ronald McNair, Ellison Onizuka, Judith Resnik and Gregory Jarvis also died.
McAuliffe’s lost lessons were finally taught in space in 2018. Astronauts Joe Acaba and Ricky Arnold performed some of experiments from the International Space Station.
In 2019, President Donald Trump signed into law a bill that will create a commemorative $1 coin to honor McAuliffe.