Season 237 - Day 6 of 14

The following events all took place in the same year. Which year?
The presidential palace La Moneda is bombed as General Augusto Pinochet overthrows the democratically elected Salvador Allende in a violent coup d'état in Chile.
On a sidewalk in Manhattan, Motorola engineer Martin Cooper makes the world’s first handheld mobile phone call, reportedly ringing up his rival at Bell Labs to brag.
Queen Elizabeth II officially opens the Sydney Opera House, designed by the Danish architect Jørn Utzon, changing the skyline of the harbor forever.
The Supreme Court issues its landmark 7–2 ruling in Roe v. Wade, affirming that the Due Process Clause of the 14th Amendment extends to a woman's decision to have an abortion.
Pink Floyd releases their prism-adorned masterpiece The Dark Side of the Moon, an album that will go on to spend a record-breaking 741 consecutive weeks on the Billboard charts.