NASA faces uncertainty as key leaders, including Jim Free, retire. The leadership vacuum raises doubts about the Artemis moon mission, especially amid pressures from SpaceX's Elon Musk to prioritize Mars exploration.

NASA is losing four key senior officials close to its flagship moon program, according to people familiar with the changes, adding more uncertainty over the agency's space exploration trajectory as Elon Musk and President Donald Trump play up missions to Mars.

The US space agency is losing four senior officials, insiders say, including a key defender of the Artemis missions Nasa is losing four key senior officials close to its flagship moon programme, according to people familiar with the changes,