Spotlights illuminate NASA’s Artemis II SLS (Space Launch System) rocket with the Orion spacecraft atop a mobile launcher at Launch Complex 39B at NASA’s Kennedy Space Center in Florida on Thursday, Jan. 29, 2026.
NASA/Jim Ross
The Artemis II wet dress rehearsal countdown was terminated at the T-5:15 minute mark due to a liquid hydrogen leak at the interface of the tail service mast umbilical, which had experienced high concentrations of liquid hydrogen earlier in the countdown, as well. The launch control team is working to ensure the SLS (Space Launch System) rocket is in a safe configuration and begin draining its tanks.
