1951. The train is rushing through the vast plains of USSR. The discussion is heating up between two passengers debating the idea of Oleg Lavrentyev on the possibility of achieving controlled thermonuclear fusion. A new idea is emerging from the minds of the two protagonists: a toroidal magnetic field to confine the particles. Several months several articles are published, celebrating the birth of the concept of TOKAMAK (тороидальная камера с магнитнымикатушками). The two authors are Igor Tamm and Andrei Sakharov.
The story of the train is probably a legend, the articles not. It is sometimes amusing to imagine the moment when life-changing ideas like the tokamak were created in the mind of people.