On this day in 1959, the Guggenheim Museum opened to the public in New York City.
On this day in 1971, a gas explosion killed 22 people at a shopping center in East Renfrewshire, Scotland.
On this day in 1994, North Korea agreed to stop its nuclear weapons program and opened to inspections.
On this day in 2013, a record smog (with PM2.5 level over 1000 micrograms per cubic meter) closed schools, roadways, and the airport in Harbin, China.