Soviet cosmonauts achieved the first docking of two crewed spacecraft, transferring crew members between vessels via spacewalk in orbit.

Soviet cosmonauts achieved the first-ever docking of two crewed spacecraft in orbit, transferring crew members between Soyuz 4 and Soyuz 5.

Soviet spacecraft Soyuz 4 and Soyuz 5 perform the first docking of two crewed spacecraft in orbit, allowing cosmonauts to transfer between vehicles.

Richard Nixon was inaugurated as the 37th U.S. president, promising to bring Americans together after a bitterly divisive year of war and unrest.

Soviet spacecraft Soyuz 4 and Soyuz 5 docked in orbit, achieving the first-ever linkup of two crewed vehicles and briefly forming an experimental space station.

Apollo 9 astronauts splashed down in the Atlantic after ten days testing the lunar module in Earth orbit, a critical rehearsal for the Moon landing.

John Lennon and Yoko Ono held their famous week-long 'Bed-In for Peace' honeymoon protest in Amsterdam, turning their marriage into a global anti-war media event.

Brazilian football legend Pelé scored his 1,000th career goal in a match at Maracanã Stadium, a milestone celebrated across Brazil as a national triumph.

U.S. and South Vietnamese troops launched a brutal ten-day assault on a heavily fortified ridge near the Laotian border, later dubbed Hamburger Hill.

Apollo 10 launches from Kennedy Space Center, sending astronauts to lunar orbit for a full dress rehearsal of the moon landing, nicknamed with call signs Charlie Brown and Snoopy.

Astronauts Thomas Stafford and Eugene Cernan flew the lunar module 'Snoopy' to within 15.6 kilometers of the moon's surface in a full dress rehearsal for the landing.

Colonel Gaafar Nimeiry led a bloodless military coup in Khartoum, overthrowing Sudan's civilian government and beginning his 16-year rule.

Apollo 10 splashed down in the Pacific after a dress-rehearsal mission that tested every part of a lunar landing except the landing itself.

Actress and singer Judy Garland, whose songs and persona resonated deeply with gay audiences, died in London at age 47, days before the Stonewall uprising.

Police raided the Stonewall Inn in Manhattan, but patrons fought back this time, sparking days of rioting that launched the modern LGBTQ rights movement.

Patrons and police clashed outside the Stonewall Inn in Greenwich Village after a routine raid, igniting days of resistance that launched the modern LGBTQ rights movement.

Neil Armstrong, Buzz Aldrin, and Michael Collins entered pre-launch isolation to avoid infection just days before humanity's first crewed Moon landing mission.

The Soviet Union launched Luna 15, an uncrewed probe racing to scoop lunar soil and return it to Earth before America's Apollo 11 astronauts could plant their flag.

A Saturn V rocket carrying Neil Armstrong, Buzz Aldrin, and Michael Collins lifted off from Cape Kennedy toward the moon.

One day after launch, Apollo 11's crew performed a routine mid-course correction burn as their spacecraft sped toward a historic lunar landing.

Apollo 11 sped toward the Moon, with astronauts making a televised broadcast and correcting course as anticipation built worldwide.

Apollo 11 fired its service propulsion engine and slipped into orbit around the Moon, putting Armstrong, Aldrin, and Collins one day from humanity's first landing.

Neil Armstrong and Buzz Aldrin touched down the Apollo 11 lunar module Eagle in the Sea of Tranquility, with just seconds of fuel remaining.

Neil Armstrong stepped onto the lunar surface, telling 600 million television viewers 'that's one small step for man, one giant leap for mankind.'

Astronauts aboard Apollo 11 held their final in-flight press conference as their capsule sped back toward Earth after the first Moon landing.

Apollo 11's command module splashed down in the Pacific Ocean, completing humanity's first successful crewed mission to land on the Moon.

The Woodstock Music and Art Fair reached its third day near Bethel, New York, as Janis Joplin and other acts performed for a mud-soaked crowd of roughly 400,000.

Roughly 400,000 people descended on a dairy farm in Bethel, New York, for the start of the Woodstock Music and Art Fair, a defining moment of the counterculture era.

As Woodstock wound down after three chaotic days, Jimi Hendrix took the stage before a dwindling crowd to close the festival.

The Concorde prototype broke the sound barrier for the first time, proving the Anglo-French jet could achieve sustained supersonic commercial flight.

A 27-year-old army officer named Muammar Gaddafi led a bloodless coup that toppled Libya's monarchy, beginning a 42-year rule.

Engineers at UCLA successfully sent the first data transmission between two computers connected by the ARPANET, the precursor to the internet.

Engineers at UCLA connect the first two nodes of ARPANET, a Honeywell 516 minicomputer and a Sigma 7, launching the network that would become the internet.

Ken Thompson at Bell Labs completes early work on a file system and simple kernel running on a spare PDP-7 minicomputer, a foundational step toward Unix.

Pelé scored his 1,000th career goal from a penalty kick at Maracanã Stadium, a moment so anticipated that the match paused for a full-field celebration.

Brazilian football legend Pelé scored his historic 1,000th career goal, a penalty for Santos against Vasco da Gama in Rio de Janeiro's Maracanã Stadium.

Pope Paul VI arrived in Kampala, becoming the first reigning pope to visit sub-Saharan Africa, a landmark moment for the Catholic Church on the continent.

UCLA graduate student Charley Kline sent the first message over ARPANET to Stanford, crashing after typing just 'LO' of 'LOGIN'.

UCLA graduate student Charley Kline transmitted the first message over ARPANET to Stanford, and the system crashed after just two letters.

Apollo 12 lifted off from Kennedy Space Center and was struck by lightning 36 seconds later, briefly knocking out its instruments before the crew restored power.

Apollo 12 launched from Florida in a rainstorm, was struck by lightning 36 seconds after liftoff, and still went on to make the second crewed Moon landing.

Apollo 12 lifted off and was struck by lightning just 36 seconds later, knocking out telemetry before astronauts restored power and continued to the Moon.

Apollo 12 blasted off from Cape Kennedy and was struck by lightning 36 seconds later, briefly knocking out onboard power before crew and ground control saved the mission.

Apollo 12 launched from Kennedy Space Center and was struck by lightning twice within a minute of liftoff, briefly knocking out its instruments.

Astronauts Pete Conrad and Alan Bean conducted their second moonwalk of the Apollo 12 mission, retrieving parts from the earlier Surveyor 3 probe.

Pete Conrad and Alan Bean conducted their second moonwalk of the Apollo 12 mission, collecting lunar samples and retrieving parts from the unmanned Surveyor 3 probe.

Journalist Seymour Hersh publishes his exposé detailing the My Lai massacre, forcing American attention onto the killing of hundreds of Vietnamese civilians.

Astronauts Pete Conrad and Alan Bean land the Intrepid lunar module in the Moon's Ocean of Storms, the second crewed Moon landing in history.

Investigative journalist Seymour Hersh published detailed reports on the 1968 My Lai massacre, forcing American reckoning with wartime atrocities in Vietnam.

Apollo 12 astronauts Pete Conrad, Dick Gordon, and Alan Bean returned safely to Earth after the second crewed Moon landing mission.

Apollo 12 astronauts return to Earth after the second successful crewed Moon landing, splashing down in the Pacific Ocean.

Chicago police raided an apartment before dawn and killed Black Panther leaders Fred Hampton and Mark Clark in a controversial pre-dawn assault.