Two Sad NASA Anniversaries

On January 28 in 1986, the STS-51-L Challenger was lost during launch carrying Tracking and Data Relay Satellite-B (TDRS-B); SPARTAN-203. On January 27 (yesterday) in 1967, Apollo 1 caught fire during pre–flight testing. Astronauts Virgil I. “Gus” Grissom, Ed White and Roger B. Chaffee were killed.

Those anniversaries always make me melancholy.