New York City is used as an example of what would happen if a U.S. city was hit by an atomic bomb. Illustrations show NYC being enveloped by a mushroom cloud after being hit by an Atomic bomb. The narrator explains that the entire lower end of Manhattan would be destroyed. An illustration shows the radius of the destruction. An illustration depicts the radius of destruction if the bomb were to hit Chicago. The narrator explains that destrcution would span from Holstad street to Lake Michigan. An illustration depicts the radius of destruction if the bomb were to hit San Francisco. The narrator explains that the destruction would span from Pacific ave to Townsend street and from Van Ness to the Ferry building. The following sequence is of stock footage of mushroom clouds and the city and people of Hiroshima after the bomb. The narrator explains that it only took one bomb to cause such devastation. The narrator explains that no weapon of the past equals the power of the atomic bomb. As the narrator discusses how a spear used by Alexander the Great killed only one, cannons used by Napoleon killed twelve and the Kaiser’s Big Bertha killed 88, illustrations and pictures depict these events.