Fleet of "fireball" type ufo seen!First witnessed 3 craft ascending at about a 90 degree angle in a strait line, then dimming out remaining slightly visible to the naked eye until reaching a certain altitude. This phenomenon was repeated several times over a 10-20 minute period, with the groups ranging from 2-4 (of the u.f.o.). The night prior me and 5 others witnessed the 8 of the same type (u.f.o.) flying and vanishing in the same manner. I'm sure hundreds in the area witnessed the event as well.