| International partners reject the US reason for leaving the ISS program. The US decides to explore the Moon, Mars and beyond without international cooperation. |
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| International partners reject the US reason for leaving the ISS program. The US invites international partners to cooperate with the US in the exploration of the Moon, Mars and beyond. |
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| International partners accept the US reason for leaving the ISS program. The US decides to explore the Moon, Mars and beyond without international cooperation. |
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| International partners accept the US reason for leaving the ISS program. The US invites international partners to cooperate with the US in the exploration of the Moon, Mars and beyond. |
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