Ten years ago: A 20-year-old off-duty sheriff's deputy went on a shooting rampage in Crandon, Wisconsin, killing six people, including his ex-girlfriend, before taking his own life as police closed in. Nine skydivers and a pilot were killed when their Cessna Caravan 208 crashed in Washington's Cascade Range. In a race run in scorching heat that left one man dead because of a heart condition, Kenya's Patrick Ivuti won the Chicago Marathon by a fraction of a second; another 250 runners were taken to hospitals because of heat-related ailments.
Five years ago: Venezuelan President Hugo Chavez won re-election for the third time. (Chavez died in March 2013 at age 58 after a two-year battle with cancer; he was succeeded by Vice President Nicolas Maduro.)
One year ago: The U.S. accused Russia of hacking American political sites and email accounts in an effort to interfere with the upcoming presidential election and also directly accused Russia of war crimes in Syria; Moscow dismissed the allegations. Colombian President Juan Manuel Santos was named winner of the Nobel Peace Prize, receiving a big boost in his efforts to save an agreement seeking to end his country's half-century conflict.