Putin said his troops massing at the border were pulling back, satellites showed the opposite, and that Russia had built a bridge from Belarus for tanks to cross a river into Ukraine....
Some satellites can see through clouds and track Russian troop movements at night, industry officials said....
Months after the Soviet Union in 1957 launched the first artificial satellite, Sputnik, which transmitted radio signals, then-President Dwight D. Eisenhower approved plans for the U.S.to develop and l
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2022-05-06 00:00:00.0