"I’m going to go make a difference.” Holly Ridings says watching the Challenger tragedy as a child inspired her to pursue a career in advancing space exploration. https://cnn.it/2JRURXY | CNN

Since the beginning of spaceflight, only 97 people have sat at the helm of the Mission Control Center as a flight director. Get to know our newest flight directors who will make real-time decisions to keep our astronauts safe in space: https://go.nasa.gov/2N6unSl | NASA - National Aeronautics and Space Administration