Nasa has rolled its Artemis Moon rocket back to the launch pad in Florida as preparations continue for a possible launch in early April. The Space Launch System rocket and Orion spacecraft are making the four-mile journey from the Vehicle Assembly Building to Pad 39B at the Kennedy Space Center. The move marks a second attempt after a launch in March was called off due to a problem with the rocket’s helium system. Engineers say the issue has now been resolved and will carry out a final series...