Robotmen of the Lost Planet #1

A time traveller from the year 1952 journeys to the year 2297, where he encounters a futuristic city of glass and plastic with suspended roads powered by magnetic force and solar energy. He meets a guide who explains the technological advances of the future, including the development of atomic motors capable of space travel to the moon and Mars, while discussing how the threat of atomic warfare was averted in the intervening centuries.