NASA Administrator Jared Isaacman announced significant changes to the agency's Artemis program, which aims to land on the moon in 2028.

At the core of Isaacman’s concerns is the low flight rate of the SLS rocket and Artemis missions. During past exploration missions, from Mercury through Gemini, Apollo, and the Space Shuttle program, NASA has launched humans on average about once every three months. It has been nearly 3.5 years since Artemis I launched.

NASA is revamping its Artemis moon landing program. NASA's new administrator Jared Isaacman announced the shake-up in the flight lineup Friday, days after the space agency's new moon rocket returned to its Florida hangar for more repairs.

NASA will give an update today on its progress toward sending a crew to the moon.Four astronauts will fly aboard NASA’s Orion spacecraft, circle Earth and navigate around the moon, and confirm that the spacecraft’s systems operate in the Artemis II launch,

The exploration upper stage needed to be replaced due to 'eroding cost and schedule delays.'