nation.time.com

1a4Y4 TIL in the last two decades, around 10 US aircraft carriers have been "sunk" by diesel electric submarines in war games.
4XKYN TIL that although GPS is free for the world to use, it costs $2 million per day to operate. The money comes from American tax revenue.
wLk9M TIL that although GPS (Global Positioning Satellite) is free for the world to use, it costs the American taxpayer $2 million per day to operate.