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  1. nasa.gov
    https://www.nasa.gov › wp-content › uploads
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    List of the Signatories by Date - NASA

    Jul 24, 2025 · 21 Saudi Arabia 07/14/2022 22 Nigeria 12/13/2022 23 Rwanda 12/13/2022 24 Czech Republic 05/03/2023 25 Spain 05/30/2023 26 Ecuador 06/21/2023 27 India 06/21/2023 …