One of China's workhorse rockets just exploded in flight

A Chinese Long March rocket exploded during flight, raising serious concerns about the YF-100 engine that powers much of China's space program. Up to nine Chinese rockets rely on this engine, meaning a flaw could cause widespread delays. Most urgently, the Chang'e 7 lunar mission, set to launch in about two weeks on a Long March 5, could be postponed as both China and NASA race to reach the Moon's South Pole.