This program uses live footage of two major earthquakes—in Los Angeles and in Kobe, Japan—to study their devastating effects on buildings and highways. The survival rate of structures in both cities—where building codes differ—is compared in the aftermath of the disasters. Computers simulate movement of the earth’s plates during a quake, while experts explain why even the sturdiest structures collapse during intense movement. New building techniques designed to combat this violent force of nature are discussed. (25 minutes)