The military renaissance in high frequency communications

[VE3WI Dave]

And it's not just the military who are craving HF bandwidth.  There's an article in Dec QST about HF data links for stock market transactions.  Apparently a millisecond or so faster transmission means millions of $$$.  The fastest method is atmospheric HF, faster than satellites (due shorter path length) and faster than fiber (due to velocity factor).  There's a picture of a tower with several log-periodic antennas in Chicago, owned by a stock trading firm from the Netherlands.
73
Dave, VE3WI