Time: July, 1986, about 10 PM Location: Iowa City, Iowa A friend and I were walking back from the University of Iowa library, and we were both admiring a cloudless summer night sky. We saw a light moving toward us across the sky gradually, and I assumed it was the taillight of a plane. Then the light abruptly stopped moving. Then it almost instantaneously darted right (perpendicular to its previous flight path) about 1/2 of the way across the night sky, and came to another abrupt stop. Nothin...