reposting end of last bread
POTUS CAVE REFERENCE:
overlay story below with ADSB traffic in TEXAS …
Army Is Spending Half a Billion to Train Soldiers to Fight Underground
>>For this new type of warfare, infantry units will need to know how to effectively navigate, communicate, breach heavy obstacles and attack enemy forces in underground mazes ranging from confined corridors to tunnels as wide as residential streets. Soldiers will need new equipment and training to operate in conditions such as complete darkness, bad air and lack of cover from enemy fire in areas that challenge standard Army communications equipment.
https://www.military.com/daily-news/2018/06/24/army-spending-half-billion-train-troops-fight-underground.html