"Reagan said that while the General Secretary [Gorbachev] was speaking, he had been thinking of various problems being discussed at the talks. He said that previous to the General Secretary’s remarks, he had been telling Foreign Minister Shevardnadze (who was sitting to the President’s right) that if the people of the world were to find out that there was some alien life form that was going to attack the Earth approaching on Halley’s Comet, then that knowledge would unite all the peoples of the world."
In a February 16, 1987, speech the “Survival of Humanity,” Russian leader Mikhail Gorbachev gives explicit public long-term credence to the future “UFO alien” extraterrestrial invasion meme:
"At our meeting in Geneva, the U.S. President said that if the earth faced an invasion by extraterrestrials, the United states and the Soviet Union would join forces to repel such an invasion. I shall not dispute the hypothesis, although I think it’s early yet to worry about such an intrusion. It is much more important to think about the problems that have entered in our common home."