They were taking part in the first crewed test flight of the Starliner spacecraft, developed by aerospace company Boeing.
Trade between the EU and two South American countries may start within two months under a provision application of the Mercosur deal.
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Those efforts also will impact the U.S. space agency's timeline for the future Artemis missions, moving up the revised Artemis III flight to the middle of 2027, which could make way for Artemis IV and Artemis V at the beginning and end of 2028. Under the new direction, Artemis IV would be the first mission to put astronaut boots on the lunar surface.
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