As far as is the weather tech in actual use, you can look at Project Popeye that documents the use of weather changing tech during the Viet nam war.  they used Crowd seeding to prolong and intensify the monsoon season toe destroy the rice crop.  They may have used more than that.  I am just starting to learn and haven't read widely.    The comments by Cohen state that echo terrorists are using the tech to cause hurricanes, volcanos, and I think he said temp change.    If the air force isn't using it why develop new better tech to replace unused tech.  Whether it is to keep up with others who are using it or for use, it's being used.    If its not being used, why are we seeing more powerful storms, volcanoes erupting more frequently, fluctuations in temps.  If its CO2 and increased temps then why falsify Climate data. I have researched this about a half hour and found all this.  The first link I think I got off 8chan so I am standing on their very broad shoulders there.  But there is no knowing how much more is out there.  I have only scratched the surface.