By JOE McDONALD and VICTORIA MILKO BEIJING (AP) — China’s landing of its third probe on the moon is part of an increasingly ambitious space program that has a robot rover en route to Mars, is developing a reusable space plane and is planning to put humans back on the lunar surface. The Chang’e 5, the first effort to bring lunar rocks to Earth since the 1970s, collected samples on Wednesday, the Chinese