"Thanks for all your effort," wrote the first moonwalker. When you purchase through links on our site, we may earn an affiliate commission. Here’s how it works. Neil Armstrong was appreciative, but as ...
The Apollo-Soyuz Test Project brought Soviet cosmonauts and NASA astronauts together in the first international human spaceflight. A 1973 artist’s concept of the Apollo-Soyuz Test Project, with the ...
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