The countdown clock at the Kennedy Space Center Press Site stops at T-29 seconds at the end of the second terminal countdown demonstration, bringing an end to the wet dress rehearsal tanking test on Thursday, Feb. 19, 2026. Image: John Pisani/Spaceflight Now
NASA and contractor engineers pumped more than 750,000 gallons of supercold propellants into the agency’s huge Space Launch System rocket Thursday without any signs of hydrogen leaks or any other significant problems in a major step toward launching four astronauts on a flight around the moon as early as March 6.

