On this day in 1940, Germany occupied Brussels, Belgium.
On this day in 1990, the General Assembly of the World Health Organization (WHO) eliminated homosexuality from the list of psychiatric diseases.
On this day in 2004, the first legal same-sex marriages in the United States were performed in the state of Massachusetts.
And on this day in 2007, trains from North and South Korea crossed the 38th Parallel in a test-run agreed by both governments. This is the first time that trains have crossed the Demilitarized Zone since 1953.