So this shit collapsed 2 weeks ago.

Rescue crew had been said to have worked "around the clock, 24/7" to clear the debris. But yet, only 10% of the debris had been cleared. And 100+ people are still missing.

Scientifically speaking, why is rescue so slow? How come it's been 2 weeks and they've barely made any headway clearing it? Keep in mind the nation's eyes are on it, and even international rescue crews have been called in to help.