A French satellite scanning the Indian Ocean for remnants of a missing jetliner found a possible plane debris field containing 122 objects, a top Malaysian official said Wednesday, calling it "the most credible lead that we have." Eighteen days into the search for Malaysian Airlines Flight 370, the latest satellite images are the first to suggest that a debris field from the plane — rather than just a few objects — may be floating in the southern Indian Ocean, though no wreckage has been confirmed.