Basically an energy beam from above sent energy to fry the area. The govt has been hiding the tech for a while but I think they have been doing soft disclosure lately.

You have to check out some 9/11 stuff. It looks like DEWs were amongst the technology used.

https://www.goodreads.com/en/book/show/11334129 - I tried to find Dr Judy Wood's book on Amazon.com but it has been removed. If you want a copy try her website or other countries' Amazon's. The only existing forensic study of the destruction of seven World Trade Center buildings on 9/11.

https://www.bitchute.com/video/YQOXq7umTr5o/

Dr Judy Wood has the most information and analysis about DEWs on 9/11. She goes through the physical evidence in this 2012 presentation without any conspiracy theories.

https://www.bitchute.com/video/FDCY9kfkOM5v/

https://www.sott.net/article/253140-Dr-Judy-Wood-Where-Did-the-Towers-Go

#911Truth Part 14: Building 7 Turning to Dust for Over 7 Hours (Fast Forward 45X Speed). World Trade Center 7 (also referred to as WTC 7, Salomon Brothers building, or “Building 7”) has been far too often used erroneously (intentionally and unintentionally) as “proof” of conventional controlled demolition; https://youtu.be/YCtfQJAepfU

Radio show to discuss the evidence of seven World Trade Center buildings turning mostly into dust on September 11, 2001 https://youtu.be/PfcNvm-e4gk