Now how do they know it's going to break into 140 pieces and not 160 or 90? How many of them will burn before they hit the ground?
Not that I am trying to minimize the danger for surely some of it will hit the ground. Should that be in a populated or dry grassy area... well, I don't need to go on.
It's just that I was struck by the fact that they said 140, as if they knew exactly how many there would be and what size they would be. If that is so then they have done some darned amazing engineering.