Despite revision of American plans for space exploration, the United States still maintains a significant lead in its space budget.
A notable feature of the new US space policy is its emphasis on international collaboration, not just for manned missions but in all aspects of space. The last such document, published by President George W. Bush in 2006, took a markedly more unilateralist tone.
According to the Colorado-based Space Foundation, the US government's total space budget in 2009 was $64.4bn, while all the world's other governments spent $21.7bn.
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