Carl Jung

they did no harm and refrained from all hostile acts it was assumed that their appearance over the earth was due to curiosity or to the need for aerial reconnaissance. It also seemed that airfields and atomic installations in particular held a special attraction for them, from which it was concluded that the dangerous development of atomic physics and nuclear fission had caused a certain disquiet on our neighbouring planets and necessitated a more accurate survey from the air. As a result, people felt they were being observed and spied upon from space.