The search for Malaysia Airlines Flight MH370, which vanished in 2014 with 239 people, has resumed in the southern Indian Ocean. US investigators are using advanced deep-sea robots and updated satellite data to explore a smaller, targeted zone. This new phase, contracted to Ocean Infinity on a "no find, no fee" basis, aims to provide closure for families after previous extensive searches yielded no results, fueling various theories about the aircraft's disappearance.