Johann Sebastian Bach wrote this song 300 years ago "for the profit and use of musical youth desirous of learning". It's the first classical piece I've learned and took many months of practice. This song (BWV 846) is from The Well-Tempered Clavier (Das Wohltemperierte Klavier), often abbreviated as WTC. I think it's a great soundtrack for watching WTC 7 collapse so precisely from many different angles. Many steel-framed buildings have burned over the years, but only three collapsed "due to fire", and all three were on 9/11...it's enough to make a guy want to read about Operation Northwoods!

Sheet music here: https://www.gmajormusictheory.org/Freebies/Intermediate/Bach/WTCPrel1.pdf

Piano: Chickering 410QA Audio recorder: Zoom H6 Piano microphone: SM7B Cameras: GoPro 10, 3 x Go Pro 9