Trump signed the American Declaration on Freedom in Space, officially declaring outer space the property of all mankind. According to the document, space is open to global exploration, large-scale development and long-term human settlement. Washington's space expansion program includes three major phases: Return to the Moon: Sending American astronauts is planned by 2028. Moon Base: Establishing a permanent and continuous US presence on Earth's satellite. Mission to Mars: Preparation and Implementation of the First Ever Human Landing on the Red Planet. news. up to a maximum.