NASA's Mars Sample Return project faces cancellation, sparking concern among experts. The Commerce, Justice, Science, and Related Agencies Appropriations Act, passed by the U.S. House of Representatives, allocates a budget that threatens the project's future. The Mars Exploration Program Analysis Group (MEPAG) is deeply worried about this development, as the project has been a top priority for planetary science. The group's chair, Victoria Hamilton, emphasizes the potential for groundbreaking discoveries, citing the tantalizing samples collected by the Perseverance rover. She questions the decision, wondering how the U.S. can expect success in more ambitious missions if it can't handle this one. The cancellation also raises concerns about the future of the Mars Perseverance rover and the integrity of the collected samples. However, the bill includes funding for a Mars Future Missions program, offering a glimmer of hope for the project's survival. The Planetary Society's Jack Kiraly notes that while the project faces cancellation, the funding could help develop a sustainable path forward for Mars exploration, including a future sample return campaign.