@misc{indiciae4c4f091d2d9c,
  title = {Daring you to ask What if? Centennial Challenges},
  author = {Roman, Monsi and Prater, Tracie},
  year = {2019},
  url = {https://ntrs.nasa.gov/citations/20190033017},
  note = {Source identifier: 20190033017}
}