You know; just imagine, lets say a 40 storey HDB flat, ok, blow
up the supporting beams in the void deck - what happens? Imagine..
just imagine...
Then after that, the aftermath, the panic, the lost of trust or
faith, what do you think will become of ordinary public people?
De-stabilized. Once that happens, employees won't be able to turn
up for work, so on and so forth.
I'm no terrorist mastermind, any kid can dream up a plan like this.
All you need, is to cause panic and lost of faith. Lost of
confidence.