Both the US and Russia have made significant contributions to space exploration, and it is difficult to determine which space program has been more successful as they have different strengths and areas of expertise. Russia was the first country to launch a satellite and a human into space, while the US was the first to land humans on the moon. In recent years, the US has been at the forefront of space exploration with NASA's Mars rover missions and plans for future crewed missions to the moon and Mars. Ultimately, both countries have made important contributions to space exploration and have achieved many significant milestones.
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