Wait a minute, I thought buildings collapsed into dust at f…

Wait a minute, I thought buildings collapsed into dust at freefall speed. This doesn't look right. 🤔🤔🤔

https://www.wusa9.com/article/news/local/dc/dc-fire-arrives-just-as-building-collapses/65-4f04926f-b024-4722-bac4-0d43cf27fe81