公告称，美国与沙特将签署太空合作协议。

Group 1 - The core point of the article is that the United States and Saudi Arabia are set to sign a space cooperation agreement [1] Group 2 - The agreement signifies a strengthening of bilateral relations in the field of space exploration and technology [1] - This collaboration may lead to advancements in satellite technology and joint space missions [1] - The partnership could enhance both countries' capabilities in space research and development [1]