Milestones

Ten years ago: The Iran-Contra congressional hearings ended, with none of the 29 witnesses tying President Reagan directly to the diversion of arms-sales profits to Nicaraguan rebels.

Five years ago: The Senate voted to sharply restrict and eventually end U.S. testing of nuclear weapons. Millions of South African blacks joined a nationwide strike against white-led rule.

One year ago: At the Atlanta Olympics, the U.S. men’s 400-meter relay, without Carl Lewis, failed to win the gold medal, finishing behind Canada. The American women’s 400 and 1,600 relay teams, and the men’s 1,600, all won gold. The U.S. men’s basketball team beat Yugoslavia 95-69 to win the gold.