Although the Guided Flight Section of the Society was only established last year, there have already been a number of valuable lectures and discussions and we can rely on the Section to provide a series of authoritative papers on various aspects of design and development. It might, therefore, be timely and appropriate for the Society to consider these new weapons in a somewhat wider context; and I propose to discuss the impact of guided weapons on our concept of air power and on the field of aeronautics as a whole. I must make it quite clear that I am expressing my own views; I am not describing official policy.