https://www.nytimes.com/1987/12/09/politics/reagan-and-gorbachev-sign-missile-treaty-and-vow-to-work-for.html
An immediate mood of warmth was established as the two leaders agreed this morning to call each other by their first names, a White House official said. He quoted the President as telling Mr. Gorbachev, ''My first name is Ron.''
Mr. Gorbachev answered, ''Mine is Mikhail.''
''When we're working in private session,'' Mr. Reagan reportedly said, ''we can call each other that.''
The new treaty, which provides for the dismantling of all Soviet and American medium- and shorter-range missiles, establishes the most extensive system of weapons inspection ever negotiated by the two countries, including placing technicians at sensitive sites on each other's territory.
''I have often felt that our people should have been better friends long ago,'' [Reagan] told his guest as they stood facing the Washington Monument across an array of military honor guards. Mr. Gorbachev received a 21-gun salute.
A choice was offered, Mr. Gorbachev declared: ''Fears and prejudice inherited from the cold war and leading to confrontation, or common sense, which calls for action to ensure the survival of civilization.''