NASA has revealed its latest plan to return astronauts to the Moon in 2024 and estimated the cost at $28 billion. US Congress will have to sign off on the financing for a project that has been set by President Donald Trump as a top priority. The $28 billion would cover the budgetary years of 2021-25, out of which $16 billion would be spent on the lunar landing module. In a phone briefing with journalists on the Artemis mission to return human to the Moon, NASA administrator Jim Bridenstine noted that “political risks” were often the biggest threat to NASA’s work, especially before a crucial election. The Trump administration last year directed NASA to land the first woman and the next man on the moon by the end of 2024, moving up the space agency’s previous moon landing schedule by four years. Three different projects are in competition to build the lunar lander that will carry two astronauts—one of them a woman—to the Moon from their vessel Orion. The first one is being developed by Blue Origin, founded by Amazon CEO Jeff Bezos, in partnership with Lockheed Martin, Northrop Grumman and Draper. The other two projects are being undertaken by Elon Musk’s SpaceX and by the company Dynetics. The first flight, Artemis I, scheduled for November of 2021, will be unmanned: the new giant rocket SLS, currently in its test phase, will take off for the first time with the Orion capsule. Artemis II, in 2023, will take astronauts around the Moon but will not land. Finally, Artemis III will be the equivalent of Apollo 11 in 1969, but the stay on the Moon will last longer—for a week—and will include two to five “extravehicular activities.”