WHAT ALL HAPPENED JANUARY TO APRIL 1973
Find out what all happened January to April 1973

Vietnam War: Citing progress in peace negotiations, President Richard Nixon announces the suspension of offensive action in North Vietnam. (15. January 1973)

The World Trade Center in New York is officially dedicated. (4. April 1973)

Launch of Pioneer 11 spacecraft. (6. April 1973)

President Richard Nixon announces that a peace accord has been reached in Vietnam. (23. January 1973)

A chartered Boeing 707 explodes in flames upon landing at Kano Airport, Nigeria, killing 176. (22. January 1973)

Watergate scandal: U.S. President Richard Nixon announces that top White House aides H. R. Haldeman, John Ehrlichman and others have resigned. (30. April 1973)

The crew of Apollo 17 addresses a joint session of Congress after the completion of the final Apollo moon landing mission. (22. January 1973)

A volcanic eruption devastates Heimaey in the Vestmannaeyjar chain of islands off the south coast of Iceland. (23. January 1973)

Martin Cooper of Motorola makes the first handheld mobile phone call to Joel S. Engel of Bell Labs, though it took ten years for the DynaTAC 8000X to become the first such phone to be commercially released. (3. April 1973)

Operation Barrel Roll, a covert US bombing campaign in Laos to stop communist infiltration of South Vietnam, ends. (29. March 1973)

The Pulitzer Prize-winning photograph Burst of Joy is taken, depicting a former prisoner of war being reunited with his family. (17. March 1973)

Vietnam War: The last United States combat soldiers leave South Vietnam. (29. March 1973)

The American Indian Movement occupies Wounded Knee, South Dakota. (27. February 1973)

Major League Baseball owners vote in approval of the American League adopting the designated hitter position. (11. January 1973)

Launch of the LexisNexis computerized legal research service. (2. April 1973)

Black September storms the Saudi embassy in Khartoum, Sudan, resulting in the assassination of three Western hostages. (1. March 1973)

Elvis Presley's concert Aloha from Hawaii is broadcast live via satellite, and sets the record as the most watched broadcast by an individual entertainer in television history. (14. January 1973)

The American League of Major League Baseball begins using the designated hitter. (6. April 1973)

Project Tiger, a tiger conservation project, is launched in the Corbett National Park, India. (1. April 1973)

Watergate scandal: The trial of seven men accused of illegal entry into Democratic Party headquarters at Watergate begins. (8. January 1973)