SpaceX is set to launch the fourth test flight of Starship on June 5, aiming to address past failures with significant hardware and software upgrades. The mission will test the reusability of both the Starship and Super Heavy booster, following previous setbacks including engine shutdowns and loss of control. With new filtration systems and enhanced thrusters, SpaceX hopes to achieve a controlled reentry and soft splashdown, pushing closer to its goals of lunar and Martian exploration.