507

"Could it be a miscalculation? Impossible."

After muttering to himself in astonishment a few times, McDonald suddenly exclaimed, "Ah, I see, it's just that the wall is too thick. Move back, move back!"

The dust was too thick for any night vision to be of use, and before Yang Yi could even get a clear look at the wall, McDonald had already called for a retreat.

A moment later, McDonald shouted loudly, "Detonate."

There was another explosion, followed shortly by a dull thud.

"Done! I knew there wouldn't be a problem, it's just that the wall was too thick and fell without collapsing..."

Yang Yi couldn't wait for McDonald's explanation and charged forward once more.

A one-meter-thick wall had collapsed, creating a large hole two meters wide and one and a half meters high, surrounded by broken rebar. It was indeed a reinforced concrete structure, but McDonald had accomplished it.