Steve Jurczyk, now acting administrator of NASA, as seen during an agency meeting at the 2019 Space Symposium meeting in Colorado Springs. (Image credit: John Grant/Boein...

In moments of crisis, American presidents have sought to summon words to match the moment in the hope that the power of oratory can bring order to chaos and despair. The ...

(CNN) - The United States Mint is to memorialize Christa McAuliffe, the teacher and astronaut who died in the Challenger disaster in 1986, with a commemorative silver dol...