The Swedish pop group ABBA performs during the Eurovision Song Contest 1974 in Brighton, England, with the song "Waterloo," on February 9, 1974. ABBA went on to win the competition that year, launching a hugely successful career. #

Oregon still had scattered gasoline-supply problems in May 1974, after an oil embargo was imposed on the United States in 1973 by the Organization of Arab Petroleum Exporting Countries. Here, a gas station in downtown Portland shows a sign saying that the day's allocation was sold out. #

An overhead view of the Skylab Orbital Workshop in Earth orbit, as photographed from the Skylab 4 Command and Service Modules during its final fly-around by the CSM before returning home. Skylab, launched in May 1973, was home to three crewed astronaut missions until February 1974. #

Marian Skoog shows a customer how to use a new 24-hour sidewalk teller in Pittsburgh, Pennsylvania, on July 2, 1974. Automatic teller users were able to make deposits, withdraw cash in $25 or $50 amounts, and pay mortgages, loans, and utility bills. #

The Atlanta Braves outfielder Hank Aaron swings a bat at home plate during spring training in March 1974. In April, Aaron would hit his 715th career home run, surpassing Babe Ruth's record. #

Sections of pipe form an interesting pattern where they are stacked in a Fairbanks, Alaska, storage yard on May 30, 1974. The sections are set to be joined together to form the 800-mile-long Trans-Alaska Pipeline from the Arctic Ocean oil fields to the ice-free harbor at Valdez. The pipeline began carrying oil in 1977. #

South Vietnamese Rangers rush children to a helicopter for evacuation from the Duc Hue base camp, about 35 miles northwest of Saigon, on April 5, 1974. The camp had been under enemy artillery attack for more than a week. #

An overview of the grounds of Expo '74, the World's Fair held in Spokane, Washington, shortly after it opened. Officially named the International Exposition on the Environment, Spokane 1974, the expo lasted from May through November, with pavilions and exhibits from governments and organizations around the world focused on environmental themes. The grounds were set on the revitalized site of a former rail yard, and remain open today as Spokane's Riverfront Park. #

A parachute opens behind the Sky Cycle X-2, carrying the stuntman Evel Knievel as he attempted to jump the Snake River Canyon. The parachute deployed early, preventing Knievel from reaching the other side. #

The boxer Muhammad Ali puts on a show at the New York State Athletic Commission's office in New York City on January 23, 1974, as he tries to force his way into the room where his opponent, Joe Frazier, was getting his pre-fight physical. #

Tom Baker, the actor who portrayed the fourth incarnation of the Doctor in the sci-fi television series "Doctor Who," meets one of the show's creatures in a 1974 publicity shot. #

Despite subfreezing temperatures and rain, a crowd waits in line outside the Paramount Theater in New York City for a showing of "The Exorcist" on February 4, 1974. Theater operators in the 28 cities where the picture was showing reported full houses, long lines, and extra showings. #

A scene from the "Carnation Revolution," the mostly peaceful coup that took place in Lisbon, Portugal, on April 25, 1974. Military officers overthrew a dictatorial government that had ruled for decades, setting the stage for democratic rule. #

People dance in the streets of Harvard Square in Cambridge, Massachusetts, on August 9, 1974, following the resignation of President Richard Nixon on television. More than a thousand people participated in the demonstration. #

Original caption: "San Francisco: Patricia Hearst, kidnapped 70 days ago by the Symbionese Liberation Army, was named as a material witness in the robbery of a San Francisco bank. Charles Bates of the FBI said the above photo shows there was a bank robber (upper right), with a weapon pointed at Patricia. Above photo purportedly shows Patricia Hearst (center) with weapon during the holdup." #

Original caption: "A crowd of demonstrators in a march against racism in Boston as they tried to defy a city order and attempted to push past a barricade of thirty to forty police officers (at right) who were blocking the way to Bolyston Street at Massachusetts Avenue. Police say two people have been arrested and at least one man slightly injured in the skirmish. The crowd then proceeded along the original route to the Boston Common where a rally was planned." #

Parents march in support of LGBTQ rights at a gay-pride parade in Greenwich Village, New York City, on June 30, 1974. At right is the lawyer Dick Ashworth, marching with a sign that reads, "I'm Proud of My Gay Son." Ashworth later became one of the founding members of PFLAG (Parents, Families, and Friends of Lesbians and Gays). #

Original caption: "The scene in Talbot Street, Dublin, where two car bombs exploded, May 17, 1974, during the rush hour as office workers and shoppers were hurrying home for the weekend. Twenty-seven people were killed and scores injured by bombs in the Irish Republic, May 17—the worst single death toll since the Northern Ireland troubles began five years ago. Three bombs in Dublin caused 22 deaths. Another exploded in the center of the border town of Monaghan, killing five and injuring at least twenty." #

A Turkish-army tank passes the Saray Hotel in the Turkish section of Nicosia, Cyprus, on July 24, 1974. On the roof of a nearby building is a picture of Kemal Ataturk, the founder of the modern Turkish republic. The 1974 invasion was sparked by an abortive coup by supporters of union with Greece. It led to the occupation by Turkey of the northern third of Cyprus and some 200,000 Greek Cypriots fleeing or being expelled from their homes in the north. #

A young girl rides her tricycle on a street in the aftermath of Cyclone Tracy, a tropical cyclone that devastated the city of Darwin, in Australia's Northern Territory, on Christmas Day, 1974. The cyclone destroyed some 70 percent of Darwin's buildings, causing more than $800 million in damage and killing more than 65 people. #

Original caption from October 30, 1974: "Perspiration flies from the head of George Foreman as he takes a right from challenger Muhammad Ali in the seventh round in the match dubbed 'Rumble in the Jungle,' in Kinshasa, Zaire. Foreman was knocked out in the eighth round." #