I believe WTC 7 was the site for the very large diesel generators that would power NYC's emergency response center on its 23rd floor. Fires from the Towers ignited the huge diesel resevoirs and weakened the structure as did the impact of two skyscraper collapses. I saw WTC 7 go down in the late afternoon of 9/11 after FDNY concluded its fires too out of control to attack.
Thanks for the info............
I had no idea that there were huge diesel reserves 23 stories up in WTC 7........
What a major mistake!