in 1947 , kenneth arnold , an experienced pilot in the USA , reported that he saw nine large round objects traveling at about 2,800 meter an hour to the left and north of mount rainier. in 1952 , there were nore than 1,500 UFO sightings around the world . in 1954 a woman and her children belived they saw a ufo above their house . the women said the saw two aliens in the spacecraft