The Apollo-Soyuz Test Project was the first international human spaceflight mission, marking the end of the space race. American and Soviet spacecraft docked in orbit, and astronauts and cosmonauts conducted joint experiments. This mission symbolized a thaw in Cold War tensions and the beginning of international cooperation in space.

Apollo 17, the last mission of NASA's Apollo program, returned to Earth after a successful mission to the Moon. This mission marked the end of an era in lunar exploration and the space race, as the United States shifted its focus to other space endeavors, such as the Space Shuttle program.

The Soviet Union launched Salyut 1, the first space station, into orbit. This marked a new phase in the space race, focusing on long-duration human spaceflight and space habitation. Salyut 1 paved the way for future space stations and demonstrated the Soviet Union's continued innovation in space technology.

Apollo 11 successfully landed on the Moon, and Neil Armstrong became the first human to step onto its surface, uttering the famous words, 'That's one small step for man, one giant leap for mankind.' This achievement fulfilled President Kennedy's goal and marked a decisive victory for the United States in the space race.

Cosmonaut Alexei Leonov conducted the first spacewalk during the Voskhod 2 mission, spending 12 minutes outside the spacecraft. This achievement by the Soviet Union was a significant milestone in human space exploration, demonstrating the ability to perform extravehicular activities in space.

John Glenn became the first American to orbit the Earth aboard the Friendship 7 spacecraft. This successful mission was a pivotal moment for NASA and the United States, demonstrating their capability to send humans into orbit and compete with the Soviet Union's earlier achievements.

President John F. Kennedy delivered a speech to Congress, setting the ambitious goal of landing a man on the Moon and returning him safely to Earth before the decade's end. This speech galvanized the United States' efforts in the space race, leading to increased funding and focus on the Apollo program.

Yuri Gagarin became the first human to travel into space and orbit the Earth aboard Vostok 1. This monumental achievement by the Soviet Union was a major milestone in the space race, showcasing their leadership in human space exploration and intensifying the competition with the United States.

Explorer 1 was the first satellite launched by the United States, marking America's entry into the space race. It was launched from Cape Canaveral and discovered the Van Allen radiation belts, a significant scientific achievement that demonstrated the United States' growing capabilities in space exploration.

The Soviet Union launched Sputnik 1, the first artificial satellite, marking the beginning of the space race. This event shocked the world and signaled the Soviet Union's advanced capabilities in space technology, prompting the United States to accelerate its own space program.