I also like the part at the end, which is much simpler but also sounds pretty effective: > Scientists found they could double the ballistic performance of the

I also like the part at the end, which is much simpler but also sounds pretty effective: > Scientists found they could double the ballistic performance of the armour by introducing the holes to the steel, while halving its weight. [It works] because when a bullet hits, it's always near to the edge of a hole. This causes the bullet to topple over, turning it from a sharp projectile to a blunt fragment which is easier to stop."