Spain legalized same-sex marriage.
This made Spain the fourth country in the world to do so.
Source
Harrison returned to our screens for ''Indiana Jones and the Dial of Destiny.”
Charles Blondin became the first person to cross Niagara Falls by walking across a tightrope.
Robert H. Lawrence, Jr. was selected as the first African-American astronaut.
The first leap second was added to the UTC time system.
Donald Trump became the first US president to visit North Korea while meeting Kim Jong Un.
