If we're right, and they are incorporating Q's posts into their targets in order to have their own version of 'future proves past' then I'd go with bridge.
Q has said numerous times 'THINK BRIDGE.'
Now, we all know he likely does not mean any sort of physical bridge, but early on there were photos posted of the Golden Gate bridge as a guess.
Deep State is evil & the clowns are panicked, so it's possible they'd go that far.
I have no idea about what those kids of explosives can do in that quantity, but just putting it out there from a strategic psy ops FF perspective.