As
@addertooth & others have stated, this was a low power explosive.
I have done testing of blast rated building facades with ANFO & C4, this was neither!
OKC = 1800 lbs ANFO & left a 33' diameter x 8' deep crater. Nashville images show no large crater below blast. Those RV parts are scattered but there.
They probably have found photo's of RV tag # if it had one.
It does look like there is a loudspeaker on the roof.
If this RV had Moore then 750-1000# payload I'd expect it to be ridding low in the back, not level.
Most likely Propane or Ox-Acetylene/Nitrous-Acetylene tanks set off with a pretty crude method like flares & this would explain 15-20 minute delay from end of countdown.
From the likely phony gunshots, loudspeaker prewarning, & loudspeaker countdown it sure seems like every effort was made to avoid mass casualties.
Kinda screams religious zealots or an individual or small group with an ax to grind against a business or .gov organization within about 4 address #'s of the parking spot.
Leaving my tinfoil hat on the shelf for now, but if we don't get full details pretty quick I'd say tinfoil would be warranted!
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Nashville bomb was a Yuge Fireball probably went 200' high from some of the video angles.
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For comparison 960# ANFO
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The Purple flash center pic is the only flash captured by my camera & precedes the blast.
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Next frame
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Shock-wave propagation
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No Fireball, but that Purple flash was pretty cool & not visible to my eye.
Now C4, this is only about 1/2#
This pic shows det cord lit & traveling 6400 m/s (Yellow squiggle passing explosive box).
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Flash is much greater then ANFO, but it's instantaneous & Orange with no fireball.
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Bulge in roof of conex left end is + shock-wave.
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