Another interesting article sent over by Robert AK3Q, about security and the return to HF radio. Task Force (CTF) 75 successfully completed communications systems tests using HF radio waves to broadcast voice and data 6,050 miles from Naval Base Guam to Port Hueneme, California, July 27, 2017.
As security becomes more and more of a concern, the US military is looking to radio as secondary systems in case of satellite interruption. Maybe us hams can teach them a thing or two!
https://www.dvidshub.net/news/243667/ctf-75-successfully-tests-hf-reach-us-mainland