Historic Handshake. NASA public domain image colelction.

Over its sixty-year history, primarily classified military The Soviet space program was responsible for a number of pioneering accomplishments in space flight, including the first intercontinental ballistic missile (R-7), first satellite (Sputnik 1), first animal in Earth orbit (the dog Laika on Sputnik 2), first human in space and Earth orbit (cosmonaut Yuri Gagarin on Vostok 1), first woman in space and Earth orbit (cosmonaut Valentina Tereshkova on Vostok 6), first spacewalk (cosmonaut Alexey Leonov on Voskhod 2), first Moon impact (Luna 2), first image of the far side of the moon (Luna 3) and unmanned lunar soft landing (Luna 9), first space rover (Lunokhod 1), first sample of lunar soil automatically extracted and brought to Earth (Luna 16), and first space station (Salyut 1). Further notable records included the first interplanetary probes: Venera 1 and Mars 1 to fly by Venus and Mars, respectively, Venera 3 and Mars 2 to impact the respective planet surface, and Venera 7 and Mars 3 to make soft landings on these planets.

NASA Photo Collection

Détente (French pronunciation: ​[detɑ̃t], meaning "relaxation") is the easing of strained relations, especially in a political situation. The term is often used in reference to the general easing of the tensions between the Soviet Union and the United States which began in 1969, as a foreign policy of U.S. presidents Richard Nixon and Gerald Ford called détente; a "thawing out" or "un-freezing" at a period roughly in the middle of the Cold War. Détente was known in Russian as разрядка ("razryadka", loosely meaning "relaxation of tension"). After the Cuban Missile Crisis of 1962, the two superpowers agreed to install a direct hotline between Washington D.C. and Moscow (the so-called red telephone), enabling leaders of both countries to quickly interact with each other in a time of urgency, and reduce the chances that future crises could escalate into an all-out war. The U.S./U.S.S.R. détente was presented as an applied extension of that thinking. The SALT II pact of the late 1970s continued the work of the SALT I talks, ensuring further reduction in arms by the Soviets and by the US. The Helsinki Accords, in which the Soviets promised to grant free elections in Europe, has been called a major concession to ensure peace by the Soviets. The period was characterized by the signing of treaties such as SALT I and the Helsinki Accords. Another treaty, START II, was discussed but never ratified by the United States. There is still ongoing debate amongst historians as to how successful the détente period was in achieving peace. Détente ended after the Soviet intervention in Afghanistan and US boycott of the 1980 Olympics in Moscow. Ronald Reagan's election as president in 1980, based in large part on an anti-détente campaign, marked the close of détente and a return to Cold War tensions. In his first press conference, president Reagan said "Détente's been a one-way street that the Soviet Union has used to pursue its aims.