I worked under conditions of the highest security and under great pressure, first in Moscow and subsequently in a special secret research centre. At the time we were all convinced that this work was of vital significance for the balance of power in the world and we were fascinated by the grandeur of the task.
My public stand represented a turning point for me and my entire future. The article very quickly became known throughout the world. For a long time the Soviet press contained no mention of the Progress, and later references were either disapproving in the extreme or else ironic. A great many critics, even if sympathetically disposed towards me, regarded my reflections in this work as exceedingly naive and speculative.