Existentially sad to see Hangar No. 1 burn. When I was really young, the Rockwell Ziggurat in Laguna Niguel and the blimp hangars at MCAS Tustin were the first structures I ever recognized as being, well, architecture. I’m sure much of my head start in being a young aviation nerd just comes from having the constant presence of the hangars and MCAS El Toro around in early 70s Orange County.
Undoubtedly an irate property developer torched it. The hangars had fallen into bad shape and the costs involved in refurbshing them into proper shape are civically prohibitive.