Milestones

Ten years ago: The space shuttle Discovery blasted off from Cape Canaveral, Fla., marking America’s return to manned space flight following the Challenger disaster.

Five years ago: Bosnia’s parliament spurned an international peace plan, voting overwhelmingly to reject it unless Bosnian Serbs returned land taken by force.

One year ago: Oklahoma City bombing defendant Terry Nichols went on trial in the same courtroom in Denver where Timothy McVeigh was convicted and sentenced to die. Nichols was later convicted of involuntary manslaughter and conspiracy, but acquitted of murder and weapons-related counts; he was sentenced to life in prison.