Milestones

Ten years ago: The 15th winter Olympics opened in Calgary, Alberta, Canada. President Reagan and Mexican President Miguel de la Madrid met in the Mexican resort of Mazatlan.

Five years ago: The government of Bosnia-Herzegovina began blocking the distribution of food in the capital of Sarajevo to protest ineffective international attempts to stop the war.

One year ago: Discovery’s astronauts hauled the Hubble Space Telescope aboard the shuttle for a one billion mile tune up to allow it to peer even deeper into the far reaches of the universe. On Wall Street, the Dow Jones industrial average broke through the 7,000 barrier for the first time, ending the day at 7,022.44.