Analyse @NASA's tweets
We work to never repeat mistakes from our past. On our Day of Remembrance, we honor all of our fallen heroes, including the crews of Apollo 1, Challenger STS-51L, and Columbia STS-107: https://t.co/tPuU3VVXDf
Feb. 1 marks 20 years since the Columbia tragedy. #NASARemembers https://t.co/R2w9X1XQ9f
Feb. 1 marks 20 years since the Columbia tragedy. #NASARemembers https://t.co/R2w9X1XQ9f