In November 1985, the United States "Air Force One" arrived in Geneva. The US president at that time, Ronald Reagan, met with the new leader of the Soviet Union, Mikhail Gorbachev. They began negotiations on nuclear disarmament.
The Iron Curtain was in effect at that time. All in all, this "meeting" was generally considered as one of the ice breakers for the cold war.
However, the first meeting between Reagan and Gorbachev didn't go as well as expected. The two parties were discussing the "Strategic Defense Initiative" as well as the debate on human rights and "regional issues". The meeting looked like it was going to end on a bad note.
At the end of the meeting, around five o'clock in the morning, the two parties finally agreed to issue a joint statement, which didn't contain any actual promises.