A primer on this subject:
- DARPA’s Glide Breaker; U.S. Hypersonic Strategies Part 1
- U.S. Hypersonic Strategies Part 2; Board Game for a Rainy Day
- U.S. Hypersonic Strategies Part 3
- U.S. Hypersonic Strategies Part 4
- U.S. Hypersonic Strategies Part 5
- Hypersonic Strategies, Part 6
- Hypersonic Strategies Part 7; Directed Energy Weapons