Yan Fei understood this principle, so he changed his target and began to attack the ground one kilometer away from the entrance. The Quantum Radar scan revealed that there were many large buildings 100 meters underground, each teeming with researchers. Yan Fei didn't know what significant things lay 200 meters deep, but the presence of so many researchers at the 100-meter level was enough to justify attacking the site.
A GBU-28 laser-guided bomb hit the desert surface, boring rapidly downward. With no hollow elevator shafts present, when the GBU-28 laser-guided bomb reached a depth of 80 meters, it exploded violently. However, since there was still some distance to the 100-meter depth, the Research Center and its personnel there incurred no casualties. But the second GBU-28 laser-guided bomb reached a depth of 140 meters. The shockwave from the explosion reached the Research Institutions and their personnel at the 100-meter level, inflicting significant casualties upon them.
