What event was seen as a symbol of the gradual relationship improvements between the United States and the Soviet Union as the Cold War was coming to an end?
A. The Soviet space center and the US space center signed a treaty agreeing to put the past behind them and work together for future space endeavors.
B. A handshake that occurred between the commanders of a US and Soviet space craft that were involved in a joint moon mission.
C. Astronauts from both countries taking a trip to the moon together aboard one space craft.
D. A male astronaut from the Soviet Union and a female astronaut from the US walked on the moon together.

Cold war was a period of Geopolitical tension between the United States of America (USA) and the Soviet Union (USSR) which lasted roughly from the end of the world war to 1991. Cold war the conflict of two political and economic philosophies i.e Capitalism and Communism. Cold war led the two countries to indulge in Space race to show their supremacy over each other.

In July 1975 Apollo-Soyuz mission was signed jointly by these two countries and US Brigadier General Thomas Stafford shook hands with Soviet cosmonaut Alexey Leonov after signing the treaty. This iconic handshake marked the formal end to Space Race and beginning of the end of the Cold war.

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