NASA's Artemis Program Hits Major Roadblock: Engineers Stunned by Unforeseen Thruster Issue NASA's ambitious Artemis program, aimed at returning humans to the lunar surface by 2025, has hit a major snag. Engineers working on the Space Launch System (SLS) rocket have discovered an unforeseen issue with the vehicle's main thrusters, sparking concerns about the project's timeline and budget. The problem, which has been described as a "significant challenge," has left scientists scrambling to find a solution. As NASA officials work to address the issue, the future of the Artemis program hangs in the balance, raising questions about the feasibility of meeting the program's ambitious goals.