The astronauts set to become the first lunar visitors in more than half a century have arrived at their launch site. The Artemis II crew flew into Florida’s Kennedy Space Center from Houston on Friday. It’s the closest the four have come to launching on the lunar flyaround. Fuel leaks and other rocket issues caused two months of delay and two hangar-to-pad rollouts. NASA is aiming for a launch as soon as Wednesday. The Space Launch System rocket will send the four on humanity’s first astronaut moonshot since Apollo 17 in 1972. The 10-day flight will end with a Pacific splashdown.