Weakening and drilling
The weakening team use heavy jack-hammers to knock down many of the internal walls. They must be careful. If They weaken the wrong walls,the building could come crashing down and kill them.It's a skilled job.
Then the drilling team drill the holes for the explosives. Each hole must be carefully checked. It must be the right depth and in the right place. This is a long and tedious job. The drilling team have about 200 holes to drill on each blast floor. That's over 800 holes to check and double check. The drills are very noisy. The drillers have to wear special muffs to protect their ears. And so must I. Sometimes I feel like my head's about to split open.