Historically superpowers have jostled for supremacy above the Earth. America and Russia vied for dominance in the 1950s and 1960s. The Russians put the first man in orbit. The Americans landed a man and planted their flag on the Moon a few years later.In the 1970s a golden era of cooperation was forged culminating in the construction of the International Space Station (ISS), which began in 1998.Along with 13 other partner nations, the two superpowers built what is now the largest structure in space. It is not owned by any one nation, and each depends on the other to operate.
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