1. Catie Edmondson.  “House Passes $738 Billion Military Bill with Space Force and Parental Leave.”  New York Times.  11 Dec 2019

2. Oriana Pawlyk.  “It’s Official: Trump Announces Space Force as 6th Military Branch.” Military.com.  18 June 2018

3. “A New Age of Space Exploration is Beginning.” Economist. 18 July 2019

4. United States.  Office of the Director of National Intelligence.  “Worldwide Threat Assessment of the U.S. Intelligence Community.” 29 Jan 2019

5. United States.  Office of the Director of National Intelligence.  “Annual Threat Assessment of the U.S. Intelligence Community.” 5 Feb 2024

6. “Space Trash is Falling form the Sky. And That’s Not the Worst of It.” Washington Post. 13 Nov 2024

7. United States. Government Accountability Office. “Large Constellations of Satellites.” 29 Sept 2022