By Joey Roulette WASHINGTON, Aug 5 (Reuters) - A SpaceX rocket piece floating in space since last year smashed into the moon at high speed early Wednesday morning, joining the ranks of meteoroids, wayward spacecraft and other pieces of space junk that have bombarded the lunar surface for ages,

NASA Administrator Jared Isaacman discusses the agency's three-phase plan to establish a permanent moon base. Isaacman also reacts to reports of a SpaceX Falcon 9 rocket stage hitting the lunar surface at 5,