High Frequency Active Aural Research Project is a joint Air Force and Navy project that uses 72 foot antennas, 360 total - spread out over 4 acres in Gakona Alaska. The official statement is that it is a "is a scientific endeavor aimed at studying the properties and behavior of the ionosphere, with particular emphasis on being able to understand and use it to enhance communications and surveillance systems for both civilian and defense purposes. http://www.haarp.alaska.edu/
The Investigation of researchers Begich and Manning uncovered bizarre schemes. US Air Force documents revealed that a system had been developed for manipulating and disrupting human mental processes through pulsed radio-frequency radiation over large geographical areas and such power-beaming transmitters could be used for geophysical and environmental warfare including weather-control technology.