Milestones

Ten years ago: President Reagan announced that Soviet leader Mikhail S. Gorbachev would visit Washington the following December for a summit, during which the two leaders would sign a treaty banning intermediate-range nuclear missiles.

Five years ago:Iran-Contra special prosecutor Lawrence E. Walsh released an excerpt of notes taken by former Defense Secretary Caspar Weinberger in January 1986 which suggested then-Vice President Bush was fully aware of the Reagan administration’s arms-for-hostages deal with Iran. (Bush said despite the notes, he was not aware until December 1986 that the arrangement was an actual arms-for-hostages swap.)