Remembering the Challenger disaster:

Dr. Sanity, a former NASA flight surgeon, was at Cape Canaveral in Florida on that fateful day 20 years ago assigned as the Crew Surgeon for Mission 51-L.

Below the Beltway remembers.

Mike’s Noise has a link-filled tribute and recommends this video commemoration at Chris Valentine’s.

NASA remembers.

Space.com remembers.

I’ll never forget how President Reagan brought the nation together. Here’s his address with video, audio, and full transcript. Reagan’s closing words:

The crew of the space shuttle Challenger honored us by the manner in which they lived their lives. We will never forget them, nor the last time we saw them, this morning, as they prepared for their journey and waved goodbye and “slipped the surly bonds of earth” to “touch the face of God.”