Twitter users are taking time out today to remember the crew of the Challenger space shuttle and their families. Twenty seven years ago today, disaster struck and left an indelible mark on the nation’s soul — especially a generation of schoolchildren who will never forget.

https://twitter.com/ScottAGould/status/295899075511988224

Video of the explosion:

President Reagan’s speech to a grieving nation:

https://twitter.com/kris_sims/status/295895449334861825

We will never forget.