Here - no listen again though
According to this programme it is incredibly techie and difficult to make any building collapse quickly and neatly in more or less its own footprint, even with controlled explosions, let alone without them...
But we are supposed to believe that WTC1 & 2 did just that, within an hour or so of being smacked into by jetliners full of fuel; and that WTC8 also did it, after a couple of relatively minor internal fires and a few more hours.